This may be a dumb question (I'm an audio novice) but is there any good reason to keep older versions of Samplitude on my computer? In other words, I've upgraded to ProX4, do I need X3 and X2 on my computer still or can I simply uninstall them to free up space?
I suggest that you keep them until you are sure that the latest version works and that any projects done with an older version, requiring more work, also work properly with X4. When satisfied, you can remove X2. I suggest that you always keep one older version in case something goes wrong with an update to the current version and it stops working. You can then, at least, use the previous version in the meantime.