Thank you for your answer.
I checked more carefully, and it appeared to be 2 WinMerge installations in 2 different folders, as you suggested, then I've removed both and installed the new version only. Now PMPU does not detect it as outdated anymore.
As for Avidemux, I dis-installed it, checked their forum, downloaded and installed the 2.7.5 (x64) for Windows, but unfortunately PMPU downloads the older 2.7.4 (x64) and tries to install that anyway.
Sorry to bother you again and thank you
I checked more carefully, and it appeared to be 2 WinMerge installations in 2 different folders, as you suggested, then I've removed both and installed the new version only. Now PMPU does not detect it as outdated anymore.
As for Avidemux, I dis-installed it, checked their forum, downloaded and installed the 2.7.5 (x64) for Windows, but unfortunately PMPU downloads the older 2.7.4 (x64) and tries to install that anyway.
Sorry to bother you again and thank you