Upgrading leaves old files

[DustinLuck]

Observed behavior:
Upgrading from v2.8.0.64 to v2.9.0.5 leaves old files behind.

Expected behavior:
Files that are no longer needed should be removed.

Steps to reproduce:

1. Run the v2.9.0.5 installer and choose the location of the installed v2.8.0.64 application.
2. Copy the application folder to another location.
3. Unistall v2.9.0.5.
4. Run the v2.9.0.5 installer.
5. Compare the files from the backup location in step 2 to the new installation in step 4.

These are the files from the previous version that were not cleaned up:

• \help\clipboard.htm
• \help\customeditors.htm
• \help\dragdrop.htm
• \help\find.htm
• \help\intellisense.htm
• \help\keyboard.htm
• \help\menus.htm
• \help\options.htm
• \help\overview.htm
• \help\schemas.htm
• \help\ui.htm
• \help\updates.htm
• \help\validation.htm
• \runtimes\win-x64\native\WebView2Loader.x64.dll

System Information:
Windows 10 Enterprise v21H2
v2.8.0.64 starting point was a portable installation