reisen_udongein_inaba

the first few times i opened imperishable night and played it, it had perfect 60 fps with no issues but recently after leaving it alone and running the game the first time in a few months, i keep on getting 40-50 ish fps and when i tried to play with the fps it felt really slow and just not good to play with. is there any way i could fix this?? i have tried redownloading it but i still get the same result i don't really know anything on how to fix this kind of stuff, so any help is appreciated

yeah i have the same problem too, ive tried turning off my antivirus for a few seconds to open touhou18 and it did work, but the music wasnt playing so i had to restart it, which didnt yield any different results. edit: nvm i somehow got touhou 18 to work.. now i can actually play it !