To Steve and all, First thing I did this morning was to fire up Vue 4.05 beta again. I got the same message about incompatible language. My OS (Windows 98) is is french. When I click OK, Vue opens fully in english language, but freezes immediately, I cannot create a new scene or open any existing one. I cannot do any thing on my computer either, because every thing is frozen (Windows). I had to shot down my machine (with the button) and restart it again. Also I have put back all the files and folders from the backup into the Vue root and it worked fine. But as I'm curious, I have done the whole thing again (installed the 05 beta) and got the same result as yesterday. Now I'm back to my Vue 4.03 and will wait for a better update. I'm lucky it works again. Guitta