Blank page after activation

I keep getting a blank page after activation of this plug in and it renders my whole network of sites unusable.

Deleting the plug in folder and all of its contents fixes the issue but of course this means that the Plug In is not installed.

I get directed to example.comwp-admin/network/plugins.php?activate=true&plugin_status=all&paged=1&s=

I have had Pro Sites working once, I changed a couple of options and got this error. Been the same ever since.

I've deleted all of the Pro Sites tables in PHPmyadmin

What else can I do to make this work?