I can confirm what kruddykan saying, when installing the new version of WB 10.89, there is no prompt to uninstall the existing version and reboot. All that happens is it does the installation and then telling you it need to reboot.
There was a small problem though once it was installed. For some reason the Opera Browser would not skin for me as it did on version 10.84. Not even the Per Application change could make it work, quiet not sure why.
Another note is that the drop down menu's in Firefox Version 89.02 (latest) would not skin either, which was possible when using Firefox Version 88.0.1 (the frame still get skinned when the box is ticked to 'Allow WindowsBlind to skin Firefox (titlebar mode needs to be enable and restart) so atleast that part is working). Although that might be because Firefox done some changes that prevents that from happening, just thought I mention it though since it been possible before. And not seen it mentioned elsewhere either, so not sure if you were aware.
I am on Windows version 21H1 (OS Build 19043.1052)
Just installed it and it didn't work.
I tried using the purge tool for WB but that didn't work either. Got two RegSvr32 warnings boxes though:
First one:
The module "C:\Program Files (x86)\Stardock\WindowBlinds\WBSrv.exe" was loaded but the entry-point DllUnregisterServer was not found.
Make sure that "C:\Program Files (x86)\Stardock\WindowBlinds\WBSrv.exe"is a valid DLL or OCX file and try again.
Second one:
The module "C:\Program Files (x86)\Stardock\WindowBlinds\WBCore.exe" was loaded but the entry-point DllUnregisterServer was not found.
Make sure that "C:\Program Files (x86)\Stardock\WindowBlinds\WBCore.exe"is a valid DLL or OCX file and try again.
No screen shoots since it was not possible to take any during the purge. (And I did the purge twice)
For the moment I have reverted back to WB version 10.84 since that one does what I want it to.