Hey, I'm glad you're enjoying the game, and thanks for the kind words!
The succubus lead should have been deleted along with the other leads once you learn about the kidnap plot - I even have a safeguard for it in place as there used to be an issue with skipping failing to delete it. No idea why it's back, but if you post your latest save file in the #help channel on the CK Discord server (https://discord.gg/bSBeR2X) I can edit it out for you :)
Viewing post in Corrupted Kingdoms (NSFW 18+) comments
The details on where to find saves and such are all pinned in the #help channel, under "FAQ:" but just for simplicity I'll copy the relevant part here. Not sure which OS you're on, so I'll just list them all!
WHERE ARE SAVES LOCATED ON ANDROID?
Android/data/com.domain.corruptedkingdoms/saves
WHERE ARE SAVES LOCATED ON PC?
PC > Local Disk (usually C:) > Users > USERNAME > AppData > Roaming > RenPy > CorruptedKingdoms-1547378918
WHERE ARE SAVES LOCATED ON LINUX?
~/. renpy/CorruptedKingdoms/
WHERE ARE SAVES LOCATED ON MAC?
~/Library/RenPy/CorruptedKingdoms
Hope that helps! :)