Ah, that's a bit of a new one... here's our best guess for now:
Download nw.js v 0.48 from here https://dl.nwjs.io/
extract the folder, then drag and drop all the files from the 'nwjs-v0.48' folder into your Prowler directory (where Prowler.exe is). Replace anything it asks for
Delete 'Prowler.exe / game.exe', then rename the new 'nw.exe' (assuming you're on windows) to game.exe and run it.