Fan starts when Power switch flipped on, never turns off

fan gcode Maylan Scan Printer

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Newbie, just brought the Mini V2

Trouble started after clicking on "Scan Printer" Maylan wifi software, right click the black system tray icon. Software is now uninstalled.
After clicking Scan Printer, a loud fan started, and now in under a minute whenever I flip the power switch on the fan starts, and never turns off

Ive tried these from an older thread didn't do anything
http://xxx.xxx.xxx.xxx/set?code=G4 P300000
http://xxx.xxx.xxx.xxx/set?code=M106 S1

Then tried these to reset the machine from the wiki. M502 turns off the fan for about a second then it restarts again

Clearly clicking on the Maylan wifi software "Scan Printer" did something to my fan, how do I undo it?