Eyex is clearly a masterpiece and it’s a shame it must rely on a bad followed and scripted third party driver.
Even in Vjoy forums the devs could only say “saitek is a known issue, you must have read the forum before”… wow! My compliments! That’s the right way to solve a problem.
However, i upgraded my win 8 to Win 10, leaving Saitek’s win 8 driver inside. It’s now working PERFECTLY. Everything runs fine. I don’t know if this helps, try to do a fresh install of vjoy and then install the Saitek win 8.1 drivers, Windows should take them as good and maybe you’ll solve the problem like me.