I have a vbulletin 4.1.2 that's been suspended because it's sending out spam. I was told to upgrade since that version is suspectible to hacking bots. It's a small forum but because I can't upgrade to the vbulletin 4.5 or to 5 without paying $169 I'd rather switch to xenforo. My question is do I have to upload all my vbulletin files in my forum directory to my new shared host server and transfer the database? Or can I just transfer the database and install xenforo and upgrade my old posts from the mysql database?