I just reformatted my computer, switched from 8.1 back to windows 7, both x64.
Now when I run RamDisk I'm unable to select .svi files. When I go to "Open" I only get the option for .img files.
Just rename *.SVI to *.IMG, the file format is the same and they will load without any issues. We had to rename *.SVI because of compatibility issues with CCleaner.