I managed to solve the problem and I will explain how I solved it so that people who have the same problem in the future can solve it, I have an RX 590 8GB and I use the adrenalin drive, what was causing the problem is that the AMD driver was not recognizing the DCS multithreading, I went to the driver's games list and saw that it only had the normal DCS, I had to add DCS multithreading to the list for the driver to recognize DCS multithreading, and I had a problem that wasn't letting me add DCS multithreading because of it have the same name as the normal DCS executable, so I had to change the name of DCS multithreading to DCS MT, after that I managed to add the game to the game list on the drive so the drive recognized it, and when I went to run DCS multithreading it gave an error because his name is DCS MT, so after I added him to the adrenalin driver game list I had to change the name of the game from DCS MT to the name it was previously (DCS), I hope I can help someone who is having the same problem.