I’ve just downloaded the latest beta5 revision ( nominally for windows 10 ) and installed it on my win7 pro laptop. No problems with the installation, and it seems to run OK. It did however remove the previously installed beta3 revision.
Now to explore!!
It would appear that there are unsuitable drivers installed for COM ports. A Micro board is recognised under “Other devices”, but the IDE is unable to load a Sketch even though board and com port are selected. Pity there isn’t a Win 7 version of IDE 2.