Now that you have a good GWX make a copy of the entire data folder as it is so if/when you make any mod you will always have a complete source of a known good set of files.
While GWX is certainly superior to any previous mod including SW-Med; SW-Med does have some very nice ships not available in GWX that can be added with no extra editing for them to show up.
If you deleted the whole thing and want to add them it is not that hard.
Go to the UBI folder and change the SH3 folder name to GWX.
Now, install a new SH3 patch it to 1,4 )(I make a complete copy of that stock data folder as a reference source)
Install SW Med to the 1.4 stock version and copy the best ships to GWX. (I also make a copy of the SW-Med data folder as well)
The most important would be the sloops (type 2 frigates) Egret, Bittern and Grimsby, the Hunt class DE, the Hclass DD the 2 Italian light cruisers, The USS New Orleans heavy cruiser, the British light cruisers (particularly the Arethusa class), the extra carriers and really any others. They will not conflict. Copy all the ones you want from the Sea folder and make sure you then add the same from the roster files.
You already paid for SW-Med and now have the best SH3 version in GWX but there is no need to not use some of those very nice models you own in GWX.
Hopefully you will not be flamed for doing so.
Wulfmann
Arethusa
Grimsby