I was able to get the 8.2.2 versions of xenbus and xenvdb installed, but I’m not sure this was a wise path. Though QWT seemed to install, and I eventually got the VM to boot again, I get this error when I try to right click and copy to vm from the win10 vm: “qrexec-client-vm.exe - System Error / The code execution cannot proceed because xencontrol.dll was not found. Reinstalling the program may fix this problem.” If you click OK it gives more popups about one other thing that cannot be found: libxenvchan.dll,
I did have some difficulties after installing QWT. First it would not shut down entirely from Windows even after ~20 minutes waiting so I had to do it from Qubes. Then I had some trouble on boot. The guide section I linked in my last message said to expect a boot that would not pop up a gui, but then you should be able to shut down and restart and it will work.
But it kept not coming back up, I tried several times to get it to boot. Also even trying to shut it down was not working, producing the error “Qube Status: / Domain has failed to shutdown: shutdown domain ‘59’ with libxenlight”. Another time it was domain “61”. Each time I killed the Qube with qvm-kill.
Finally I noticed a message in this thread that mentioned the “gui-emulated” qvm-prefs should be set to 1. This is not actually mentioned in the guide I linked maybe it should be added. When i set this pref, the next boot attempt succeeded. Or maybe this is pure coincidence.
Anyway now that the VM has booted I don’t think (?) QWT is working based on this one test of trying to right click copy a file to a VM. Maybe there are other tests to run? I suppose next step is to try and re-install QWT as suggested. But I wonder if the problem is I installed those old versions of xenbus and xvdb.