1. If you fulfill all the points of conversion, and not to import attachments and click the import was successful. To return to the import attachments will be already impossible? 2. On my VB forum, there are additional groups that I created myself. When you convert, they will appear in the XF? Or do I need to delete them, and users move in group - registered? 3. The groups are named in Russian. I need to rename them to English, or the language in which they are written does not affect the transfer of groups?