You can either move your tables to a new database, or move the new tables to an old database (probably easier).
This is done by using suneido -dump
The main tables you need from the new database are stdlib, suneidoc (the help), and imagebook. You may also want the Contrib library.
If you move the new tables to an old database, I would recommend dumping and loading the entire database to ensure it has been created with the new exe.
Of course, you also need to use the new exe and dll’s.
I would recommend making a backup before you do any of this in case you run into any problems.