@KelltimeOG
Fixed in https://github.com/notepad-plus-plus/wingup/commit/5d89e486a5cb63251b8ed0b0e9f441a9774709ff
The fix will be in WinGUp v5.4.1, which is included in Notepad++ 8.9.3 release.

@P-A hasn’t come back since my reply. But I had a few minutes to experiment.

Using the published v8.9.2, I could replicate the problem:

Open fresh v8.9.2 Language > User Defined Language > Define your language… Folding in code 2 style: open = openfold, close = closefold Save as… = SomethingNew open disappears, but close remains Exit and restart Notepad++ Language > User Defined Language > Define your language…, choose UserLanguage: SomethingNew Folding in code 2 style> open still missing, but close remains Add again open = openfold, and close the UDL dialog: it appears to be there, but repeating 6/7 will show back in condition 8 at this point.

But, when I try the same sequence with the bugfix version from PR#17522, it works as expected (openfold doesn’t go missing at all).

That PR will be part of v8.9.3 Release Candidate, expected Mar 14. So it looks to me like the bug has already been fixed.

@Alan-Kilborn

I understand, but unfortunately, to have it hosted on the App Store, Apple charges £80 a year for the developer license, so I need to cover this cost, hence the 99p price.