diff --git a/operational b/operational
index eb1767cda93d54b0f544feefd8619123bfddbfe8..e95d9d57b9abb85bae057864c427550614c0a781 100644
--- a/operational
+++ b/operational
@@ -121,7 +121,9 @@ C:\ProgramData\mbackup\mbackup.txt
   https://stackoverflow.com/questions/11981498/wix-heat-tool-create-component-with-win64-attribute
 - Wix to install file in another name, add Name attribute in <File>.
   <File Id="mbackup.exe" Name="mbackup.exe" Source="bin\Release\netcoreapp3.0\win10-x64\mbackup-for-windows.exe" KeyPath="yes" Checksum="yes"/>
-- 
+- vscode powershell integrated console is not the same as powershell.
+  it doesn't read $profile, and can't run ". $profile" command.
+  it's best to press + to create a regular powershell terminal.
 
 * later                                                               :entry:
 ** 2019-11-14 supports expand Downloads dir in user-default.list
@@ -212,6 +214,10 @@ Both local.list and local.exclude.
   - TODO how to support upgrade when I click a new msi?
     currently every msi is a standalone msi and will always install fresh.
     is the UpgradeCode used for this?
+
+    does <Product> version have any effect on generated msi file?
+    how to integrate this version with dotnet application version?
+    *now*
   - mbackup.msi works on B75I3 host.
   - try mbackup.msi on win 10 VM.
     how to require dotnet core 3.0 in .wxs file?
@@ -234,7 +240,6 @@ Both local.list and local.exclude.
 
         it works.
         PS C:\Users\IEUser> &"C:\Program Files\mbackup\publish\mbackup.exe" --target root@sylecn01.emacsos.com:/data/backup/PC-backup/IEUser --ssh-key E:\id_rsa --remote-user sylecn
-        *now*
       - TODO failwith should not be used in UI code. It throws unhandled exception. System.Exception.
         search: f# exit early without shifting to the right
         in haskell, I use maybeT and eitherT etc.