TF2 Hammer Won't Open After Booting Up

Generalisk

L1: Registered
Sep 8, 2020
27
1
IDK Why, But For Some Reason When You Boot Up The SFM SDK (Or SFM Hammer), You Can No Longer Boot Up TF2 Hammer Unless SFM Is Uninstalled (And I Don't Want That). Why Does This Happen And How Do I Fix That?
 

Generalisk

L1: Registered
Sep 8, 2020
27
1
Also, I Already Tried To Fix It By Attempting To Clear All SFM, TF2 & Hammer Data In the Registry. But Nothing.

Please Help Me ASAP, I Really Wanted To Use The New London Pack!