Which OS do you have ? Which tool did you use to clean the REGISTRY ? Are you on a fresh OS install ?
Go to the following location and path, and manually delete both the “Daring Development” and “Infinity” folders, if they are still there.
C:\Users\Your- Windows USERNAME\AppData\local\Daring Development, as well as C:\Users\Your- Windows USERNAME\AppData\local\Infinity.
Check the TEMP folder as well. I can upload you an older version of Infinity, but It may not work properly, if you try to use it online.
Give this a try. Update to the latest version, once again. Try to re-download INFINITY from this link. The stub should update things:
https://s3.amazonaws.com/wemod/infinity/releases/master/Infinity-Setup.exe