On Ubuntu 20.04, I downgraded a gnuradio 3.9 installation to gnuradio 3.8. Using sudo apt remove.
I had to manually delete the ~/.cache/grc_gnuradio/cache.json file to remove some cached block parameters left over from 3.9 that were different from 3.8 However even after that I have a few keystrokes in 3.8 that used to work but now do not. Particularly trying to Disable a selected block now deleted that block rather than deselecting it - whether the disable command is invoked typing the keyboard D character or the mouse on the context-menu. Is there perhaps some other cached file or config file left over from the 3.9 installation that is changing the nominal 3.8 GRC keyboard functions? -- Tom, N5EG
