Weird! I would *assume* the game would run fine with those specs...
If it's not too much of a pain, if you could check to see if there is a log file at:
%APPDATA%\Godot\app_userdata\dunderbeck\logs
(C:\Users\USERNAME\AppData\Roaming\Godot\...)
And if so, send it to Dunderbeck (at) RustLTD.com, that would be amazing! Hopefully we can figure out what happened.