Fatal error when enabled plugin

Hi, i tried to isntall Snapshot in a client site and everytime when i enable that, i receive this error:

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 122880 bytes) in /home/storage/xxxx/xxxx/xx/xxxxxxx/public_html/portal/wp-admin/menu.php on line 81
(i replace url here for security purposes).

I just can see my Admin CP again if i rename snapshot folder in plugin directory, directly from FTP.
Any solutions?

Sorry for english, btw.