I almost panicked until I read this part:
Code:
If no 3.7 option is available then choose the 3.6 option - then after flashchat is installed, edit the flashchat config.php file, setting the cms value as below ;
//your CMS system
'CMSsystem' => 'vbulletin37CMS',// default - default CMS, blank - stateless CMS
If you upgraded from 3.5 to 3.6 to 3.7... Well, if you just do this. It works.