From a category view (list of topics) you can go to tools -> merge to merge new topics into old ones.
I red in your licence, that its not allowed to change anything...
Do you meant the licence itself or the nodeBB app?
Hello @random, welcome to NodeBB!
Under the GPLv3 license, you are allowed to change and re-distribute the software. However, I believe all re-distributed versions must also maintain the GPLv3 license and be open source.
THX for the fast reply!!!!