When I tried Settings → Apps → Default apps, UiPath didn’t appear in the Default apps list even though UiPath itself is working. Also,
Right‑click the .xaml file → Properties → “Change” next to “Opens with” After doing that, for some reason Microsoft Edge launched instead. It seems like something is broken… Should I just give up?
for any application you can select the default app by right clicking on the file
select properties → near open with click on ‘Change’ → Select application you want to open with (if not found then click on choose an app from PC and select the application from its installation folder)