diff --git a/README.md b/README.md
index 7892201..c21621c 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,8 @@ PEARL Procedures should be installed according to the regular Igor Pro guideline
 - Find the `HDF5.XOP` extension in the `Igor Pro Folder` under `More Extensions/File Loaders`, create a shortcut, and move the shortcut to the `Igor Extensions` folder next to your `User Procedures` folder.
 - Find the `HDF5 Help.ihf` next to `HDF5.XOP`, create a shortcut, and move the shortcut to the `Igor Help Files` folder next to your `User Procedures` folder.
 
+PEARL Procedures has been tested under Igor Pro version 6.37 (32-bit). Older versions (particularly prior to 6.34) may not be compatible. Please update to the latest Igor Pro version before reporting any problems.
+
 
 License
 =======
@@ -32,3 +34,12 @@ Copyright
 
 Copyright 2009-2016 by [Paul Scherrer Institut](http://www.psi.ch)
 
+
+Release Notes
+-------------
+
+### rev-distro-1.1.1 
+
+- If you have upgraded PEARL Procedures from pre-1.1.1 and Igor breaks in pearl-elog.ipf while opening an experiment, please delete the ELOG preferences file `pearl-elog/preferences.pxp`. (Check the Igor Help to find the package preferences folder on your system.)
+
+