You can download and install 7.07 even if you updated to 7.5.
You will be able to run it alongside 7.5 just as you currently can with 7.06…nothing strange about it, 7.5 is a separate programme.
Regarding the upgrade cycle…the release of a x.5 does not signify there will be no more x updates. Steinberg were completely open about this, you just assumed the wrong thing.