If you can access the PC remotely, could you open a browser on that PC and type in the following:
http://x.x.x.x/ja
where x.x.x.x is your OpenSprinkler’s IP address. It should respond with the firmware version (fwv).
Then you can also try:
http://x.x.x.x/ja?pw=yyyy
where yyyy is the md5hash of your OpenSprinkler’s device password. You can generate the md5hash from your plain-text password using this website: https://www.md5hashgenerator.com/
This should return the complete controller configurations.