I don't remember if I've reported it before. When a custom file explorer is installed and made the default, "Open Folder" in Tixati still opens Windows Explorer.
An example to test: Q-Dir by SoftwareOK is an old and free explorer replacement.
1. Install Q-Dir
2. Launch
3. In the menu bar at the top go to Settings -> Q-Dir by default -> Click on Folders
4. A new window has opened, stay on tab current user HKCU
5. Enable "I'm an expert" at the bottom
6. Now you can set Q-Dir as the default to open folders. Try navigating in Windows Explorer, each folder will open Q-Dir instead.
7. Click on "Open Folder" in Tixati
8. Tixati still launches Windows Explorer???
Expected: Tixati to launch the user's default explorer.
Tixati v2.89 and earlier, Windows 7 x64
This doesn't happen with the SHOpenFolderAndSelectItems API call. If you use this call, then Q-Dir is opened. Although it doesn't auto-select the items (probably QDir's problem).
https://docs.microsoft.com/en-us/windows/win32/api/shlobj_core/nf-shlobj_core-shopenfolderandselectitems
Firefox also uses this API:
https://hg.mozilla.org/mozilla-central/file/8e99b54b620b9100f2c9f113b2ed46271e41d3bc/xpcom/io/nsLocalFileWin.cpp#l155 hint: Cocoa and GNOME implementations are there too
