BACKUP FIRST!!!!
That's a big jump. ... I think your problem is, that you may have imported some theme-tweaks to your new TW, that are not compatible with the existing stable version.
- So you could download a new empty.html from tiddlywiki.com
- Then drag and drop your work.html from the OS file-browser to the open empty.html
- It will show you the import list
- Check this list and __only__ import your content to the new TW.
Especially have a look for tiddlers that
start with $:/ ..... SystemTiddlers ... They may contain stuff that is not compatible anymore.
Also have a look at your plugins. .... Some of them may be outdated and may behave strange with the current version
TW stable implemented a lot of functions into the core, that had been plugins in beta. ...
Just some thoughts.
mario