Hello wp_plugin, thanks for your concern. I managed to recover my data almost to the initial state of my blog.
Hope that Stephan Spencer from Netconcepts, will read this posts and hopefully he will find a solution for this problem.
The plugin sounds great for some bloggers that are using on the home page a static page.
Conclusion: I’m normal user without any programing knowledge. This is a great plugin and will be such a waste if the problem with the tags (and with custom fields in ver 2.2.0) could not be solved.
Installed ver. 2.1.4, but it seems that this plugin does not support blogs that are using tag cloud at all. Same error when I click on a tag.
Asked a friend to try ver. 2.1.4 and he got the same error when trying to visit a tag page 🙁