i have both direct x9 and x11 but since the newest win10 update few days ago i cannot even lauch this game
Do you get any error message?
Also, just for 'fun', check if windows did not for any reason uninstalled your GPU driver and installed a stupid default one instead. Have seen this happening a few times.
Also if it just doesn't startup try a repair and/or reinstalled (not deleting, just install Torchlight in the same path and so on, saves and similar shall be save, but just in case: make a backup of your saves).