I somehow ended up with both 32-bit and 64-bit versions. Removed both manually, and installed the 32-bit version in the x86 folder. Said yes to overwriting config files during installation. The program opens fine from start menu, but not through right-clicking. I see the option, but nothing happens. Any suggestions? Thanks!
I tried once more. Deleted all mp3tag files and went into the registry and deleted all entries before reinstalling again. Now it works.