The importer works fine, but it takes time. With a large Board you may reckon that it takes 1-2 days.
If you have enough space at your webhost, you can backup the /cgi-bin and /ubb directory to secound directory, configure the vars_config.cgi with the new absolut and relative paths, then just delete all Forums and start the import progress (make sure that all Forum* directorys are deleted). Just a work around but it may works
Hmmm, is think thats can be a problem with the licenes. But maybe Rick can give you a answer
