I'm on Windows 10.
I was using Calibre 4.23.0 and upgraded to 5.0.1. Discovered that plugins I relied on do not work, and tried to go back to Calibre 4.23.0.
After uninstalling 5.0.1, I cannot not install 4.23.0. The installer starts copying files for a bit, and then rolls back the installation.
The installer doesn't provide any error messages, but in event viewer, I see:
Code:
Windows Installer installed the product. Product Name: calibre 64bit. Product Version: 4.23.0. Product Language: 1033. Manufacturer: Kovid Goyal. Installation success or error status: 1603.
Now I can neither install 5.0.1 nor 4.23.0. Please help!