Yes Kari, I'm sure. v2.5.4 I opened the wsjtx_log.adi file with notepad++ and tried to find the callsign: nothing found. Now I find the qso I had this afternoon with him. And his CQ is green, as expected. But: I renamed wsjtx_log.adi in .back, and WSJTX does not create a new one (maybe it would be done after a qso).
Correct, WSJT-X will create a new logfile when next QSO is logged.
But I rescanned the adi file and the color is still green. I suspect that the colors are not depending on wsjtx_log, but on some other log, is it possible?
No, only wsjtx_log.adi is scanned by WSJT-X for previous QSOs.
Are you perhaps using some 'companion program' in addition to WSJT-X?