With the latest commit issue #432 seems to reappear (Windows10).
I can't confirm. It's working fine for me.
My QMS commit is b87ca937d8cb on Windows10.
The first snapshot shows the initial situation as described in issue #432. Even with inserted key and Enter pressed the record icon remains gray.
The second snapshot shows the initial situation after a QMS restart as described in issue #432. Even without a key in the edit field the record icon is red and works as expected.
Same issue with Ubuntu virtual maschine
Did you setup a record file?
No, I didn't. Is this a prerequisite?
Starting with gray record icon and defining a record file the record icon gets red!
Yes, QMS has to know where to store the recorded data. And this information is not stored persistent if you remove the real time source.
Thanks for clarification. Will be added to the Wiki soon.