Same problem. Tried to upgrade a while ago - their system would not let me, I wrote to support never heard back. Today, about 12 hours ago, MySQL and Apache load went way up, all links have reverted to original "showthread.php?t=xxxx" format and VBSEO.com is down for the count.
I have a hunch that it's doing a license check, which fails / times out, and then stops working.
If someone has the "final" version of VBSEO and a way to hack out the license check please contact me. I will send the upgrade fee to the charity of your choice and donate the money in a name of your choice - there is no way to purchase an upgrade to the final version from VBSEO and this problem is critical.
EDIT: I also cannot log in to the VBSEO backend via my VB3.8.7pl3 anymore. Assume the problem is related.
--------------- Added [DATE]1375369357[/DATE] at [TIME]1375369357[/TIME] ---------------
Solution here:
http://admin-talk.com/threads/dear-v...y?quote=494594