I decided to access the HELP file by using F1 key. This brought up my browser, Firefox 69.0 (64-bit), and went to http://127.0.0.1:36787/v12.16.3/ . Is there a way to make it bring up the HELP.chm by using the F1 key again?
Preferences / Miscellaneous / Advanced [Behavior]: help_interface = CHM
Thank you very much Leo. When did this change was made?
Again, Thank You.
When: A year ago, in Directory Opus 12.9.3 (Beta)
Why: Because Microsoft, no longer using it themselves, have long abandoned the help viewer in Windows and it is falling apart from neglect, not working properly on high DPI systems in particular. (Among other reasons. That's the big one.)