If I upgrade from 7.0.6 to 7.5, is it possible to keep the 7.0.6 version as a separate application on my computer, or will the upgrade completely replace the original version? I’m worried by some reports of multiplied CPU usage as opposed to 7.0.6, and would like to keep the older version in case I have problems. Thanks for your help.
7.5 installs as a separate application.
You can use either.
+1
5.5/6.5/7.06/7.5 all working here
on the same 'puter.
And FWIW can have them running at the same time as well. 
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Great thanks!