It turns out that a few months ago I had the dragon saga installed on steam (Same PC) but I started it from Patcher.exe to be able to log in with another account that was not the steam one.
I had to format the PC and a few days ago I downloaded it to the dragon saga again, but it turns out that now it only lets me open it by WPLauncher.exe.
I try to open it by Parcher.exe, PatcherPatch.exe or dragonsaga.exe after giving me game start the screen is blank and does not load anymore, the only way to load it is by WPLauncher and I would need to change the account as I have my main character in the other account