Hello,
Good on you for trying multiple troubleshooting steps, here are some more that you can try.
Try running the app in administrator mode, right click and run as admin.
You can also try running it in compatibility mode, right click on clipchamp, go to properties and go to compatibility, change the settings around and see what compatibility options work.
Another poster suggests to reset the network settings.
Open command prompt as admin and run these commands.
ipconfig /release
ipconfig /renew
ipconfig /flushdns
ipconfig /registerdns
netsh int ip reset
netsh winsock reset
netsh winhttp reset proxy
These should reset your network settings and allow clipchamp to run.
Hope this helps,
JC