I can’t install unreal engine 4.26.1

I wanted to reinstall Ue 4.26.1. I deleted UE_4.26 folder directly from pc. When i open EpicGamesLauncher and go to Library it says “Repair” on my engine version. When i click it, it doesn’t do anything just says please wait for a second and “Repair” button shows again. I tried to uninstall it from here but it does the same thing. I know i don’t deleted program properly, and i can’t install that version again