3
If you wish to upgrade you will note that this module is no longer developed, however there is some hope.
Lexikon developed by Yerres is based on wordbook, well there isn't a lot of difference just yet, so it should be easy to move your content over.
I mention this as it maybe a quicker fix to your problem, and it's under development too.
http://dev.xoops.org/modules/xfmod/project/?lexikon
Kind Regards.
Tom
http://bassmanthemes.com
http://www.xoopslance.com