If you have trouble making this mod work it's probably due to some other mod modifying the same file and overriding it.
Follow the steps below to check for any incompatibility and solve it.

1. Go to your mods directory, by default Documents/My Games/ Binding of Isaac Afterbirth+ Mods.
   
2. Press Ctrl + F to bring up the search box (or click in it in the top right corner).
   
3. Search for "titlemenu.png".
   
4. You should now get all the files named like that.*
   
5. Right click in each one of them and select "Properties" to check the location and see which mod they belong to.

*If you only get one result, and the file location corresponds to this mod, then this guide won't help you, and I doubt I'll be able to do so.

Once you find out which mods are causing the problems, go back to Documents/My Games/ Binding of Isaac Afterbirth+ Mods and locate the mods' folders. Then create a backup of them in case you want to revert any change in the future.
IF you forgot to backup the folders, just delete them and they should download from the Workshop again.

1. Select the search box again by pressing Ctrl + F or by clicking in it in the top right corner.
   
2. Search for "titlemenu.png"
   
3. Locate which one of them belongs to this mod.
   
4. Select the rest of the files that are shown and delete them (or move them somewhere else).

1. Open this mod's folder, which should be named something like enhanced_rebirth_style_title_1312121876.
   
2. Copy the resources folder.
   
3. Paste them inside the rest of the mods folders (ONLY the ones that are causing incompatibility issues).

1. Copy the folders from the backup you created.
   
2. Paste them inside Documents/My Games/ Binding of Isaac Afterbirth+ Mods.

(Running the game again should automatically update your mods)