Integration of DOpus was working quite happily, using both the Win+E keyboard command or using the 'Open File Explorer' function attached to one of my mouse keys. Suddenly, the integration has stopped working, and File Explorer appears instead. I have reviewed all the advice I could find in the FAQs and Forums, and checked that nothing has changed in settings>preferences>Launching Opus>Explorer replacement or >From the Win+E hotkey.
I am using v.13.2 on fully updated Windows 11.
If I double-click on 'This PC' icon on desktop, DOpus is invoked. I looked at the System-Wide Hotkey settings in DOpus, and there is an entry for Win+E to open a new lister [Go new].