Decided to update the ads manager and POOF... it removed the main WPFORO plugin. GONE.
Thank god for auto backups.
Please make sure you use the latest version of wpForo with latest version of Ads manager addon. Our addons don't delete wpForo, this is something impossible. I think there was some conflict or you have some program which turns off all plugins which generates some error. This is the second year people use wpForo and addons without any issue, Dozens of thousands user use our plugins together on their website, we've never heard of such strange thing. Please open a support topic on official addons support forum at gVectors.com, they'll debug and find the reason of this irregular conflict. here we only provide support for free core wpForo plugin.