Yes, it does since Character Editor V6.
Though, the current implementation focuses on the replication part of customizations itself, not the backend and database. Thus, you have to come up with your own solution.
Good News
Assets from our other products can potentially be used with the Character Editor but may require manual work depending on the asset type or features you would like to transfer. Meshes, textures and materials are easy to merge with the Character Editor, as they are designed to be cross-pack-compatible. You even may transfer meshes from this to other packs, of course if you match the engine versions or export them as FBX.
Slightly Bad News
Though, some meshes of older packs may simply do not have features of newer systems (like the facial morph targets) or are not perfectly compatible as they may have different technical approaches. These features may be added at some point in time, but we cannot guarantee that. If you have appropriate third-party software, you can of course add some of these features yourself. Old Blueprints and other logical parts, for the record, are mostly incompatible with the Character Editor, as they got greatly revamped, overhauled, or extended.
Explanation
Note, that we cannot keep all our packs in sync with the same logical base, on the one hand because of our full-time jobs, but on the other hand because we strive to deliver you content packs as modular as they can be in our eyes and just want to develop even more modern products than before. Thus, old systems sometimes just need to be replaced with newer ones. And because of the nature of Unreal Engine content packs and all your completely individual customer needs, it is difficult for us to stay compatible between pack versions and even different products. (See How does the Character Editor differ from Modular Medieval NPC?)
We hope you enjoy the Character Editor as much as we enjoyed developing it! :)
The goal of Modular Medieval NPC (released on 23. May 2018, Unreal Engine 4.19) was to enable you to create NPCs and crowds of people with lots of variations, though the NPCs could also be controlled by the player and dressed in-game with a basic character editor demo.
The Character Editor (released on 22. Apr. 2020, Unreal Engine 4.24) aims, five engine versions later, for the creation of hero characters with a higher degree of visual details incl. facial morph targets and a potentially arbitrary number of apparels attached to the character. The product unfolds its complete power in the modular in-game character editor as the name says. With that different focus, the changes of Unreal Engine itself and the more solidified knowledge how to master them, we simply had to create a whole new product rather than extending the Modular Medieval NPC.