Q: Blackcoin More?
Q: Was there a chain swap or is blackcoin-more still on the original BLK chain?
A: No! The original client is still working and stable. More is further development of Lore (no longer supported), and is still considered beta. The original client is preferred when you want stability, but it is slow with syncing to the network. Lore and More have implemented a few newer features from Bitcoin which makes it faster, especially when syncing to the blockchain. There is also payBLK which runs on node and can be used in a browser or mobile. PayBLK has an Iris variant which implements coloredcoins (tokenized assets) on Blackcoin blockchain.
All three however run on the same coin, and send and receive BLK.