If I re-run Syncthing by double clicking the ‘syncthing.exe’, a command window opens and I can use it for as long as that window is open.
Am I missing something here?
Then, restart the computer, make sure that Syncthing is running, then try to hibernate and resume. Once done, go to the “History” tab for the Syncthing task and take a screenshot of everything that has been recorded there, then copy and paste it here.
You may want to check in the config folder (see https://docs.syncthing.net/users/config.html) whether there are any panic logs there. Maybe the program crashed and that’s why it wasn’t running when you resumed the PC previously?