Ok
Progress, I have a fresh clean 12.2M install and a backup of it. I presume there is a patch file somewhere on M4T that I can dl for 13.3, but how/where do I get a 10.1 install? Is there a roll-back I can apply?
I don't believe there is a rollback. You have to start from an earlier version and patch up to the version you want. That is why I mentioned earlier that it's a good idea to keep an old backup install, like 4.07 or 4.08 so you can always have the ability to make a 4.10 install if you need to. It's not a lot of work to patch from 4.07 to 4.10 or 12.
Do you have the IL-2 CD-ROM, or do you download it from somewhere else?
Here's a link to all the patch downloads:
http://www.mission4today.com/index.php?name=Downloads&c=605On this page you will see a "MegaPatch" which goes from stock out-of-the-box to 4.12.2. I've never used it, but can be useful if you'd like to give it a try. Keep in mind that once you go above 4.10, you will no longer be able to use DBW, UP3, old HSFX, etc unless you make another install.
I have all the patches and most of the modpacks backed up on my computer just in case M4T goes down when I need it! Not really necessary I guess, just a precaution.