diff --git a/general/docs/changelogs/ch1_7_1.md b/general/docs/changelogs/ch1_7_1.md
index 45b386f90a9d91304c72122e72fa8bc1f1e15c80..5d897104801dab36577e7a47fa276cab49d0c175 100644
--- a/general/docs/changelogs/ch1_7_1.md
+++ b/general/docs/changelogs/ch1_7_1.md
@@ -3,27 +3,19 @@ The high level changelog is available at http://research.microsoft.com/en-us/um/
 
 ### Additional _noteworthy_ changes
 
-#### Tools
-
-##### Bugfix
-* TLC shows no error *trace* for violations of `TLC!Assert`, ... (regression in 1.7.0) https://github.com/tlaplus/tlaplus/issues/461
+* TLC shows no error *trace* for violations of `TLC!Assert`, ... https://github.com/tlaplus/tlaplus/issues/461
 * NoClassDefError when running TLC on Java 1.8. https://github.com/tlaplus/tlaplus/issues/462
 * Dot visualization (graphviz) fails due to invalid character ! when spec uses instantiation https://github.com/tlaplus/tlaplus/issues/452
 * Simulation mode ignores ASSUMPTIONS. https://github.com/tlaplus/tlaplus/issues/496
 * Back to state missing for lasso error trace found by simulation https://github.com/tlaplus/tlaplus/issues/497
 * AtNode does not show up in (dot) graph output of semantic explorer 52f3b01
 * Replace custom implementation of (heap) sort in TeX with java.utils.Arrays#sort https://github.com/tlaplus/tlaplus/issues/539
-End support for liveness checking and multiple workers in DFID mode because both features are unreliable https://github.com/tlaplus/tlaplus/issues/548 https://github.com/tlaplus/tlaplus/issues/544
-
-#### Toolbox
-
-##### Bugfix
+* End support for liveness checking and multiple workers in DFID mode because both features are unreliable https://github.com/tlaplus/tlaplus/issues/548 https://github.com/tlaplus/tlaplus/issues/544
 * Multiline trace expressions fail to parse in Toolbox. defe0c74915b1c27c6af2fb55c8163f3574c8918
 * Re-worked PlusCal/TLA+ divergence warning (please manually remove [1.7.0 markers](https://github.com/tlaplus/tlaplus/releases/tag/v1.7.0)). f1cf514c3b334b0968a5ac7fdf14d3e93905b14c e434e139adebf73ed8f9470117031f1ad4b749df 7c61d1a70f03fe4e54142f59487af90745386b74
 * Upgrade Eclipse foundation to its 2020-06 release for better HiDPI support. https://github.com/tlaplus/tlaplus/issues/472
 * Toolbox intermittently shows no error trace on an invariant violation https://github.com/tlaplus/tlaplus/issues/538
 
-
 ### Checksums
 sha1sum|file
 ------------ | -------------
diff --git a/tlatools/org.lamport.tlatools/src/pcal/PcalParams.java b/tlatools/org.lamport.tlatools/src/pcal/PcalParams.java
index 22de7b25fba05f028e88a78dc3270dbfa8322ffe..51be055c814bf01e5d2a60033e494c3e902295e3 100644
--- a/tlatools/org.lamport.tlatools/src/pcal/PcalParams.java
+++ b/tlatools/org.lamport.tlatools/src/pcal/PcalParams.java
@@ -18,8 +18,13 @@ public final class PcalParams
     /**
      * Parameters to be updated on each new release.
      */
-    public static final String modDate = "10 July 2019";
-    public static final String version = "1.9";
+    public static final String modDate = "31 December 2020";
+	// Can't increment 1.9 to 1.10 because VersionToNumber(str) calculates a lower
+	// numerical value for 1.10 than it does for 1.9. This breaks the FairSeq?Test
+    // tests. Until we switch from 1.xx to 2.0, increment versionWeight along with
+    // version.
+    public static final int versionWeight = 1902;
+    public static final String version = "1.11";
     /**
      * SZ Mar 9, 2009:
      * Added re-initialization method. Since PcalParams class
@@ -50,7 +55,7 @@ public final class PcalParams
         NoDoneDisjunct = false;
         optionsInFile = false;
         versionOption = null;
-        inputVersionNumber = VersionToNumber(PcalParams.version);
+        inputVersionNumber = PcalParams.versionWeight;
         PcalTLAGen.wrapColumn = 78;
         PcalTLAGen.ssWrapColumn = 45;
         tlaPcalMapping = null ;
@@ -247,7 +252,7 @@ public final class PcalParams
      // way because of the way the code evolved, and no intelligent
      // design has stepped in to fix it.
   public static String versionOption = null;
-  public static int inputVersionNumber = VersionToNumber(PcalParams.version);
+  public static int inputVersionNumber = PcalParams.versionWeight;
      // The input file's version number * 1000
 //  public static boolean readOnly = false; 
      // True iff this is a .pcal input file and the .tla file should 
@@ -310,7 +315,7 @@ public final class PcalParams
           PcalDebug.reportError("Illegal version " + ver + " specified."); 
           return false;
       }
-      if (vnum > VersionToNumber(PcalParams.version)) {
+      if (vnum > PcalParams.versionWeight) {
           PcalDebug.reportError("Specified version " + ver + 
                   " later than current version " + PcalParams.version);
           return false;
diff --git a/tlatools/org.lamport.tlatools/src/tlc2/TLCGlobals.java b/tlatools/org.lamport.tlatools/src/tlc2/TLCGlobals.java
index e6aee0b5c60b17f2d671a4038194dada25ccfe68..d68116ed66325a1ca4b4f3f87dd6fd430cc0af2e 100644
--- a/tlatools/org.lamport.tlatools/src/tlc2/TLCGlobals.java
+++ b/tlatools/org.lamport.tlatools/src/tlc2/TLCGlobals.java
@@ -23,7 +23,7 @@ public class TLCGlobals
 	public static final int DEFAULT_CHECKPOINT_DURATION = (30 * 60 * 1000) + 42;
 
 	// The current version of TLC
-    public static String versionOfTLC = "Version 2.15 of Day Month 20??";
+    public static String versionOfTLC = "Version 2.16 of 31 December 2020";
     
     // The bound for set enumeration, used for pretty printing
     public static int enumBound = 2000;
diff --git a/toolbox/org.lamport.tla.toolbox.product.product/org.lamport.tla.toolbox.product.product.product b/toolbox/org.lamport.tla.toolbox.product.product/org.lamport.tla.toolbox.product.product.product
index 504bf73169c829504693b28d532f1ee34fa43a82..e79ef3fa9372269920d06b4d75113bffcb817287 100644
--- a/toolbox/org.lamport.tla.toolbox.product.product/org.lamport.tla.toolbox.product.product.product
+++ b/toolbox/org.lamport.tla.toolbox.product.product/org.lamport.tla.toolbox.product.product.product
@@ -8,10 +8,10 @@
       <text>
          TLA+ Toolbox provides a user interface for TLA+ Tools. 
 
-This is Version 1.7.1 of Day Month Year and includes:
+This is Version 1.7.1 of 31 December 2020 and includes:
   - SANY Version 2.2 of 20 April 2020
-  - TLC Version 2.15 of 20 April 2020
-  - PlusCal Version 1.10 of 20 April 2020
+  - TLC Version 2.16 of 31 December 2020
+  - PlusCal Version 1.11 of 31 December 2020
   - TLATeX Version 1.0 of 20 September 2017
 
 Don&apos;t forget to click on help.  You can learn about features that you never knew about or have forgotten.
diff --git a/toolbox/org.lamport.tla.toolbox.product.standalone/plugin.xml b/toolbox/org.lamport.tla.toolbox.product.standalone/plugin.xml
index 620d83498e6f4fc84f2e5123b4c5aa9389f97f68..98d54a174ed9411d1a92667eccad0a4f5fac20ed 100644
--- a/toolbox/org.lamport.tla.toolbox.product.standalone/plugin.xml
+++ b/toolbox/org.lamport.tla.toolbox.product.standalone/plugin.xml
@@ -30,7 +30,7 @@
          </property>
          <property
                name="aboutText"
-               value="TLA+ Toolbox provides a user interface for TLA+ Tools. &#x0A;&#x0A;This is Version 1.7.1 of Day Month Year and includes:&#x0A;  - SANY Version 2.2 of 20 April 2020&#x0A;  - TLC Version 2.15 of 20 April 2020&#x0A;  - PlusCal Version 1.10 of 20 April 2020&#x0A;  - TLATeX Version 1.0 of 20 September 2017&#x0A;&#x0A;Don&apos;t forget to click on help.  You can learn about features that you never knew about or have forgotten.&#x0A;&#x0A;Please send us reports of problems or suggestions; see https://groups.google.com/d/forum/tlaplus .&#x0A;&#x0A;Some icons used in the Toolbox were provided by www.flaticon.com">
+               value="TLA+ Toolbox provides a user interface for TLA+ Tools. &#x0A;&#x0A;This is Version 1.7.1 of 31 December 2020 and includes:&#x0A;  - SANY Version 2.2 of 20 April 2020&#x0A;  - TLC Version 2.16 of 31 December 2020&#x0A;  - PlusCal Version 1.11 of 31 December 2020&#x0A;  - TLATeX Version 1.0 of 20 September 2017&#x0A;&#x0A;Don&apos;t forget to click on help.  You can learn about features that you never knew about or have forgotten.&#x0A;&#x0A;Please send us reports of problems or suggestions; see https://groups.google.com/d/forum/tlaplus .&#x0A;&#x0A;Some icons used in the Toolbox were provided by www.flaticon.com">
          </property>
          <property
                name="aboutImage"
diff --git a/toolbox/org.lamport.tla.toolbox.product.standalone/src/org/lamport/tla/toolbox/ui/intro/ToolboxIntroPart.java b/toolbox/org.lamport.tla.toolbox.product.standalone/src/org/lamport/tla/toolbox/ui/intro/ToolboxIntroPart.java
index 5467a41bb289c4263865f63fe1179b29416b36ee..8a8e21c454c87eed26cb8338f85c680c91538165 100644
--- a/toolbox/org.lamport.tla.toolbox.product.standalone/src/org/lamport/tla/toolbox/ui/intro/ToolboxIntroPart.java
+++ b/toolbox/org.lamport.tla.toolbox.product.standalone/src/org/lamport/tla/toolbox/ui/intro/ToolboxIntroPart.java
@@ -431,7 +431,7 @@ public class ToolboxIntroPart extends IntroPart implements IIntroPart {
 
 		final Label lblVersion = new Label(outerContainer, SWT.WRAP);
 		lblVersion.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false, 2, 1));
-		lblVersion.setText("Version 1.7.1 of Day Month Year");
+		lblVersion.setText("Version 1.7.1 of 31 December 2020");
 		lblVersion.setBackground(backgroundColor);
 	}