Hey, welcome to the forums.
Are you planning to save all the Mudokons, or you just want to continue your game?
Can you remember the level name or its look? If you can't, you might want to use the
cheats to go to any stage you want.
I have some saved files from not so long time ago, I'll upload them if you'd like to see them. (Although they are all silly, you know... just for laughs. You better not play them if you haven't reach the Brewery yet.

)
I advice you to use the cheat which you can skip the levels. I think it's the only thing I can do...

Are you planning to save all 300 Mudokons?
(To open the files, copy and paste them into Abe's Exoddus file in your PC and then they should appear when you run the game.)