ClickOnce uninstall for normal non admin accounts

The solution is to use the Control Panel to de-install the app.

There I have no problems removing an application that I as non admin user installed

Having experienced the same issue (2 years later), and not noticing the distinction between "Control Panel" and "Settings", I'd like to elaborate on Peter Vogt's own answer:

To uninstall a ClickOnce application without admin priviledges on Windows 10, use the old-style application list, now labeled as Programs and Features. Unfortunately, this can't be searched directly from the start menu, but it can be found in (at least) 2 places:

• Directly from the old-style Control Panel, as "Uninstall a program".
• From the new Settings -> Apps screen ("Apps & features"), use the "Programs and Features" link on the right.