They'd have to pay me.
Seriously though.... It's something that sometimes bothers me too- having various AC versions. It OUGHT to be easier.
So I did some more research, esp as I've just started working with some peers who are back on AC 7 *gulp* (isn't that like Win98? the land of BSOD's?)....
I came up with this procedure and a link so far..
http://support.microsoft.com/kb/257592
This ought to work with everything, even perhaps vista, though some of the menus are slightly different in Vista (for sure)
1) go to "control panel"
2) Select "Folder Options"
3) Click the "File Types" tab
and now you have some choices.
I made an extension for AC-10 called "09s" for AC 9 and "10s" -for my AC 10 solo projects, respectively. So I clicked "
New" and then
changed and associated it with AC 9 and AC10 vs AC 12 by browsing and having windows always open these with AC 9 and AC 10.
YOU can simply keep your naming method, and select a different default AC version here by clicking the "Browse" button. You can even skip all this and simply find your ArchiCAD Solo Project, along with all the other ArchiCAD file formats, and change the default "handler" app here (I.E. the default program version to associate it with, AC 7 or AC 12, 3d studio max, wordpad, etc etc- have fun!)....
Close and open the files. The FIRST TIME it will need to BROWSE for the file, but after that, it will auto open them in the PROPER/CORRECT version of AC!!!!
That...
Ought to work.
GS, with some registry editing for installation, could re-associate file types based on document versions to first look for the associated app version that made it, and open with that as the default handler before trying the latest default. A little bit of smarts and it could be done- but it might create some bigger issues... I guess we'll see!
GS, send me a check please.