Registry cleanup for non-working associations

[Erland Sommarskog]

After that I had installed Textpad 5.0 and 5.0.2, several of my associations
did not work. Windows would start Textpad, but then scream that it could not find the file. Curiously some file types seemed to work.

When I dug around in the registry I found that I had a bunch of keys like HKEY_CURRENT_USER\Software\Classes\TextPad.ins\Shell\Open\ddeexec\application
where the value for (Default) was "TextPad", while the working ones had

TextPad.5.0

(note: there is a dot between TextPad and 5.) I changed the non-working
ones to TextPad.5.0, and it seems to work fine onw. (Well, TextPad directly from the Context Menu does not bite.)

Curiously some of the working ones did actually have "TextPad". But they also seemed to have other alternatives like EditWithVS, which may be mattered.