There is only one Superior Drummer.dll on the hard drive, which is in C:Program filesVstPlugins. This is the only plugin folder on the computer and also the only path set in Reaper.
I have, however, deleted it and followed your suggestions. Everything now appears to be working as it should.
I looked in Add/Remove Programs and all I found in relation to SD2 was ‘Superior Drummer Installer’. I clicked ‘Remove’ and followed the prompts, but on restarting Reaper SD2 was still in my VST Plugins folder and it loaded as usual.
At that point I decided to run the original installation from disk (nearly an hour); this gave me v2.2.1.
I downloaded the v2.3.1 update from My Account (again) and when I tried to run it I got the error message I started with at the top of this thread.
I’m now having the same problem with SD2.3.0. It won’t update and I get the same error message. I can’t see where to uninstall this, though. There is a “Superior Drummer Installer” in Add/Remove Programs under XP; if I uninstall that will I be able to re-install the original SD crossgrade package?
I initially tried to update directly to 1.4.0 and got the error message above. No error code generated. I then tried to go via 1.3.0, etc. and got the same message.
