Today I decided to revisit Skyrim SE after almost a year hiatus. I had been playing Fallout 4 through MO2 with no problems, running 400+ mods (graphics and ESLs included). I installed a new incidence of MO2 to take the place of MO1 on my J drive (where Skyrim SE resides). For some reason MO2 wouldn't appear. If I click it again a box comes up saying that MO2 is already running, but I never see it. I went ahead and deleted that incidence of MO2 and tried to run it from my L drive (where Fallout 4 lives). I switched it to SkyrimSe and it said it needed to restart. This time the same thing happened. My task manager says the MO2 is running, but nothing shows up. Worse, I can't access Fallout 4. I have over a thousand hours on four and want to continue playing that game. All I wanted to do with Skyrim today was see how many mods I could convert to ESL so I could put in some more. Any advice?
My system is a Windows 10 pro 64 bit, 128 GHZ Ram, 8 core I07 running at 3.5 GHZ (can run faster, but it overheats), twin GTX-1080 cards with 8 GB Vram each, Liquid cooling. I wanted to ruyn the newer system, now I'm wondering if I made a mistake and should have left Skyrim with MO1.