Ib Tutorial: How to Fix 'Corrupted' Font (Solution in the Comments)
What to do: READ THE COMMENTS.
But I guess if you still wanted to do what I did despite the solution being there then...
Do NOT delete the 'broken' version of Ib
Download another version of Ib
Go into the 'data' file of your old version of Ib and copy the 'save' files
Paste the 'save' files into the data folder of your newely downloaded version of Ib.
Delete the older version (if you want)
Aaaannnddd it should all be fixed!