hi so ive been having this kind of problem and i was wondering on how can i be able to fix this T-T this has honestly been frustating and confusing to me, i tried deleting the old files as instructed and overall have tried re-downloading the game over and over again but nothing helps 
Viewing post in 14 Days With You [DEMO] comments
In the future, please keep DLC-related questions to the DLC page!!
It also looks like you've installed the DLC incorrectly. The folder name should be "14 Nights With You", not "14nightswithyou-free". You'll need to locate the correct folder and use it to replace the "14nightswithyou-free" folder instead.
If you still need help, please leave a comment on the DLC page and I'd be happy to assist further ^^