I was working in CIS lite v16.5 for a while now (Win7, x64), and everything was working fine. However, I recently downloaded and installed version 16.6. Now when I try opening projects in 16.6 I keep getting the error in the title. So I went through multiple removal/installation cycles but it didn't help. Finally, I completely removed both versions and ran a registry cleaner. After re-installation I'm still getting this error. I get this error even when I try to create a new project.
There must be some residual settings which didn't get removed when I un-installed the software, how do I fix this and get a working pspice?