What you need:
-Notepad++
-UABE Asset Bundle Extractor https://github.com/SeriousCache/UABE/releases

1. Open game folder
\steamapps\common\Ultimate Admiral Dreadnoughts\Ultimate Admiral Dreadnoughts_Data
2. Make a backup copy of the "ressources.assets" file since this ist the only file we need. ignore the other 2 ressource files.

3. Open ressources.assets in UABE, look for the TextAsset called "technologies". Select it, go to Plugins and export to .txt.
4. Open the .txt in Notepad, go to search, then replace.
Change search mode to regular expression.
search for: ", obsolete\(.*\)" without the ""
replace with: "" without the ""
click "replace all". Then save and exit.
5. Go back to your UABE where you exported the technologies file, go to Plugins Import from .txt and
import the file again. Now save and exit.
IMPORTANT: UABE cannot overwrite the file it is operating in, therefore you must save
it in another place and replace the old file manually.

Thats it your hulls are now safe from the sands of time.