[andrewas]

The problem is, each version will be looking at the same set of keys. So, create a pair of .key files you can use to update the registry, one which will create the relevant entries for each version. And hope neither of them ever try to update any of it, because that wont feed back to your .key files.

Or, you could put up with the version which works and look for another .midi converter. Sourceforge probably has one.