hello deepseadiver welcome to subsim!
first disable the mod by simply rollbacking via JGME.then if you want your UI like SH3 or SH4 style you have to go to your game folder-mods for example;
C:\Ubisoft\Silent Hunter 5\MODS\NewUIs_TDC_4_8_0_ByTheDarkWraith\data\Scrip ts\Menu\TheDarkWraithUserOptions.py and open this file with your notepad.then at the top you will find the sentence
"set below to either SH3Style , SH4Style, or SH5Enhanced
UIStyle = SH5Enhanced"
for SH3 style UI you must write UIStyle = SH3Style
for SH4 style UI you must write UIStyle = SH4Style
renable your mode and its ready!hope this helps!
ps:do this while your docked.