I wish to be able to double-click on a txt file and for it to open in Notepad as it does in Windows Explorer. I can change it to open with Word, or Wordpad (which works) but I want Notepad (which fails). Bug???
Which method are you using to try and change it? Right click > Open With > Choose Default Program (or similar, depending on Windows version) should usually work, unless the double-click event has been overridden in Settings > File Types.
Preferences / File Operations / Double-click on Files also contains an options for how to open files that look like text but aren't a recognised extension, which could come into play if the .txt file type is broken in the registry.
Have tried both these options. Changing Double click behaviour to follow path to Noteoad.exe fails. Using Right-click, Open with...Notepad works, but this is fiddly. The more efficient/quick method of Double-clicking should also work if Open with works. A work around is to install the third party program Notepad 3 and allow it to open .txt files as the default handler. Many people work with the plain Windows Notepad, and would be frustrated at Opus's failure to invoke it by double-clicking .txt files.
I should clarify: choosing Open with ...Notepad (once), works, but Choosing Open with and setting Notepad as the default program fails!
It works fine on a stock Windows system. I suspect something has broken the .txt file type in some way on your system,
You could look at the registry and compare with another machine, but an easier fix is to go to Settings > File Types in Opus, then find the .txt type and change the double-click event to explicitly run
C:\Windows\notepad.exe {filepath$}
My system is quite new, and opens Windows Notepad fine in all other explorer programs I have tried. I note others have had this issue, so I am not convinced that the problem is at my end. In any event, as I said, Notepad 3 works OK if I set it as the default text handler (it is actually an improvement on the old Windows Norepad program, and loads just as quickly). I appreciate your getting back to me.