I'm working with a lot of different arduino models and doing quite a few different arduino projects.
Some with older libraries that run on 1.0.x software, and other projects that run on the lastest build.
For some reason both IDE's are entrepreted by windows as the same, which is kinda a problem,
so either i use 2 computers or i constantly uninstall / reinstall..
I'm switching between IDE's 3 times pr week, at first it was ok, now it's just annoying.