I think that lady_morana is running into the problem when she tries to bring her RTF/TXT file into BookDesigner, JSWolf.
I remember someone else had a similar problem and that there may have been a workaround, or that vvv (the brain behind BD) was looking into something, but I can't remember what it was off-hand....
Ah, yes, a quick search and here it is:
https://www.mobileread.com/forums/sho...&postcount=199
Incidentally, did the suggestion vvv gave you in that post work for your LIT file, lady_morana?