The game is not supported, so I can’t really say anything specific, but if it worked before and now doesn’t, the best thing you can do is checking what may have changed on your system in the meantime in regard to programs that could potentially interfere. Also the ‘Alternative Hooking’ checkbox in the config app might be worth a shot.
Hooking issues almost always are related to other programs (or overlays) that also hook into games. More detailed information on the matter in the troubleshooting guide. You can find this guide either in the help that comes with vorpX or here.