Before you enable the Mod, you have to Set the path to menu.txt, find in the Data Folder of the Mod! under subfolder Menu. Then Set the path for the TheDarkWraithUserOption.py in the data folder of the mod, subfolder scripts.
Sh5/MODS/NewUis_TDC_7_1_0_by_TDW/data/Menu
Sh5/MODS/NewUi/data/Scripts
For the snorkel option enable the Mod and Set path to the above mentioned files, but this time use the path to the game folder, sh5/data/menu and sh5/data/scripts
Good hunting