Hey. I already edited a replay, it worked fine,
when I wanted to render it it told me to uninstall optifine - I did.
Now when I try to open the same file again, it simply puts me to the normal minecraft starting screen, with Singleplayer, Multiplayer etc..
I can open all other files.
Is there a way to fix it? I really really really really really need THIS file working! its important!!