I’ve just noticed something very strange: since I was unable to create a new preset, I checked the console under Linux and there was an error message regarding data.db being read-only. I then confirmed that using
ls -l. The strange thing is that the same file became read-only on the Windows laptop, too (I do not know, when). The two were running rather different versions of darktable (on Linux, always the current master, updated daily; on Windows, one of the ‘insider’ builds, but I did not update that in the past few weeks).
I do not sync data between the two.
Anyone with similar issues?