I am still using the last (ancient) version of Azureus (Vuze) because it has great plugins. I have the plugin to allow it to use the Mainline DHT, and I use the i2p plugin too (because the default i2p torrent UI is bad). Azureus is (was) the only client that can download/seed a torrent on clearnet and i2p at the same time.
Having said that, I didn't know that BiglyBT has i2p support, so I need to check that out.
The Vuze devs forked the code and went on to create and continue developing BiglyBT. So technically if you want to keep using that client best to switch over to BiglyBT.
You can stay with the old Vuze if you want but it's no longer developed since it lost its devs.