Reverted the mod to an earlier version as adding the version number to the name broke saves.
You will need to follow the below steps to get back into your save if it was made while the bad upload was live.

If your save is blocking you because it says the mod is missing, open the mod folder in your steam/workshop folder, and temporarily change the mod name so you can get into your save.
Follow these steps:
Access your HOI4 mod directory at ...\steam\steamapps\workshop\content\394360
Open folder 2073318750, which is this mod.
Then open the file named 'descriptor.mod' with any text editor program.
Change the line that says 'name="Zee's Balanced Ship Refits V2.1"' and either erase or add the 'V2.1' part as needed, then save the file, and continue your save.

- Updated several components base/refit costs. A slight reduction in refit costs across the board(~10%)

- Added missing Tier 1 discounts for several component categories that vanilla doesn't bother adding

- Reduced base and refit cost of several Light Cruiser parts that were missing the intended standardized reductions(~50%)

- Made BB and BC armor belts slightly more distinct by widening the gap between build/refit cost, speed, and HP

- Reduced base/refit cost and reliability penalty of Nuclear Engines, last version made them too costly

- Corrected several cases of vanilla not assigning discounts when crossing between "Standard" guns and "Dual Purpose" DD/CL/Secondary guns.
For example, vanilla does not give the best-case "Direct" discount when upgrading from a DP T1 to a DP T2, but it does for a Standard T1 to a DP T2. Vanilla doesn't even give Dual Purpose guns the "Same Category" discount when upgrading from DP to DP.
This is also true for Light Cruiser guns, they don't get any "Same Category" discount in vanilla at all because they mislabeled the upgrades as Heavy Cruiser guns.
Bugs like these are now fixed and discounts are now applied consistently and equally, including when crossing from one type to the other.

-updated sub engine performance stats to mirror vanilla
-added new sub_aip engines
-added new sub coating and batteries

-added new vanilla heavy ship nuclear engine, adapted RT56 variant
-added new vanilla sub ship nuclear engine, adapted RT56 variant
-added new vanilla carrier ship nuclear engine, adapted RT56 variant

-added new ice carrier armor decks

-increased carrier engine initial build cost (convert cost unchanged)

Updated Version File to ignore versions. (Paradox is overly aggressive with it's warnings and restrictions for mods)
Mod will run as long as Man The Guns is installed.