[Bearcat]

If you have the disk just rename the main folder to .. say.. IL2 SturmovikOLD.. and just install. I have two versions of the sim in the same UBI folder.. one is named C:\Program Files\Ubisoft\IL2Sturmovik 1946.. which is the version that has the UI 1.2 and the other is C:\Program Files\Ubisoft\IL-2 Sturmovik 1946 UP for the UltraPack.. and when the 4.1 comes out I will rename the main folder and reinstall 46 one more time.. I'll probably delete the UI version and either make the HSFX 4.1 or the UP version my main one..