Betas should never be mandatory. Some users will not want to test the software.
No one was ***** to test the software. The choice to update to a beta was not mandatory, it was the update from one test version to the next that was *****, but this was only after accepting the choice to be a tester. Actually more than just "accepting the choice" but deciding to deliberately go out of your way to separately download and run the installer rather than use the regular update function of the software.
I do think, however, that it could be made clearer to naive users that by running the beta's installer they are partaking in a test program using a program that has not yet been fully debugged. Perhaps the first thing the installer should do is display a large "friendy" warning about this and ask you if that was OK or not. That should at least help to avoid complaints like "the software is rushed out with bugs" being directed at beta versions.
If nothing else Totem are getting some feedback on the idea of ***** updates that they can apply to the non-beta releases.
I think it speaks volumes that I was willing to knowingly risk corrupting my iStripper installation by aborting the ***** update by using Windows task manager to ***** iStripper rather than let it proceed without my express permission.