Hi VillatraxETH,
If you can access your local network via VPN (Tailscale might work too although I can’t confirm) then you should have no problem using an SSH client to log into your Umbrel remotely.
You should have no problem using Powershell or alternatively you can download PuTTY.
See the second item in this guide and note that if you use Poweshell, the command to login into your Umbrel is slightly different than conventional SSH clients such as Putty or ones built into Unix/Linux systems.
After a successful login then all you should have to type to delete the peers.dat file is
sudo rm ~/umbrel/app-data/bitcoin/data/bitcoin/peers.dat
Followed by the password again.
The general advice is to wait about 24 hours. My Umbrel was back in operation within far less time but YMMV.