OK, I think I figured out why 64-bit Windows was having an issue with the install. I had included both 32- and 64-bit DLLs for SQL Server Compact, but they were from two different versions. When I replaced the interface DLL with the version that came with the 64-bit install, the 32-bit install wasn't working. Unfortunately, I can't test the 64-bit install. However, both sets of DLLs are now from the same install package and have the same version. So, it should now work.
Please wait about 10 minutes or so for the deployment to be finished, then you can download the new release.
Edit: DropBox is finished. Google Drive takes forever, for some reason. It still has a ways to go
Edited by OggDude