2
- Take a backup of your existing site (files and db)
- Install 2.3.3 on your new site.
- Upgrade your old site to 2.3.3 (see release notes)
- Backup your database of the old site and restore it on the new (phpMyAdmin export - import). (In between, check links in the db to the old site and replace them by the new site domain)
- Copy additional files as uploads, photo albums, themes, customisations, etc. from old to new.
On XOOPS France,
Eparcyl has done the opposite direction from CBB to NewBBex. Last week he wanted D3Forum and he converted back from NewBBex to CBB, because from there was an import function in his D3Forum.
I asked if he saved the required SQL commands. (He reversed the ones from the opposite conversion (see link in his post))