Version problems from Steam and PBW Updates

[Fyron]

The registry is set when you run SE5.exe. All you have to do to ensure the proper copy is patched is to run it before running the patcher.

(cross-posted from SEnet) :
If you purchase a game CD, it is trivial to install multiple versions. All you have to do is make a copy of the installation (eg: in a folder named SE5 1.44), and just patch one copy. I am not aware of any way to do this with Steam, however. You could try making a copy of the Steam\SE5 folder, but I'm not sure if Steam will allow non-standard paths...