Note that most of the tiddlywiki discussion these days takes place on
https://talk.tiddlywiki.org.
My technique would be to save a copy of your wiki as a single-file wiki, use the upgrade page at
https://tiddlywiki.com/upgrade to create an updated wiki, and then use the TW-node `--load` to load this into your existing or (probably safer) a new node wiki.
```text
tiddlywiki path/to/new/wiki --init server
tiddlywiki path/to/new/wiki --load path/to/upgrade.htm
tiddlywiki path/to/new/wiki --listen port=6789
```