Go to your gta V main directory and copy and paste the 5 given files: dinput8.dll > GTA V Ufuse 4X4 Trainer PC V1.1.asi > GTA V Ufuse 4X4 Trainer PC V1.1.ini > GTAVTRAINERCHECKERUP.SFV > ScriptHookV.dll

Press the "F4" key to open the menu and use the numpad keys
If trainer wont open press F3
to navigate and choose things.
Numpad8 = UP
Numpad2 = DOWN
Numpad4 = LEFT
Numpad6 = RIGHT
Numpad5 = SELECT/ENTER
You can change the hotkey to open the menu by editing the .ini file with a any desired key from:
https://msdn.microsoft.com/en-us/library/windows/desktop/dd375731%28v=vs.85%29.aspx

Updates:
. Beta 1
- Added Minigames BETA (Zombie Generator, Clown Generator, Dog Attack, Alien Generator).
- Added Max Upgrades for Vehicles.
- Added Mobile Radio.
- Fixed Player Model naming and rearranged menu a little bit.

V1.1
- Fixed Player Options.
- Fixed World Options.
- Added Notifications.
- Added .ini file for custom menu hotkey.
- Added toggle for Minigames (Still needs to be fixed)
- Fixed some vehicle glitches.
Note: Toggle a generator ON for only 3-4 seconds then stop or else it will keep spawning and your game will crash.