for whatever reason when installing the unity3 beta my 261 version was overwritten. i don’t understand why it is like this. now i have to deinstall the beta, reinstall the 261 and maybe i can install the beta again to let both coexist. but does it make sense to overwrite the working version when the beta’s intention is to let us preview test and evaluate the new possibilities? as we are working on ongoing projects, the “old” version is neccessary too…
Just rename the folder to something else… “Unity_2-6” or similar. Then it won’t get overwritten.
also be sure to back up project folders before upgrading them to 3.0 “just in case”
remember also to hold alt down when launching unity so it doesn’t automatically open 2.6.1 projects in 3.0
thanks guys,
we have some backups, yes 
but the 2.6.1 got overwritten and the 2.6.1 installer refuses to install because there is a newer version already installed. therefore i guess i have to remove all remaining resources prefs and stuff and reinstall from scratch.
will keep you posted…