Hello In the 5.0.3 version was a bug in settings dialog. This bug was fixed in the 5.0.4 version (available in the developer forum). Another possibility is edit PSPad_MU.ini file, placed in the PSpad folder manually. MultiInstanc=0 change to: MultiInstanc=1
-- <https://forum.pspad.com/read.php?2,62241,74208> PSPad freeware editor https://www.pspad.com
