Could you do a modification so that your plugin works with Multisite.
As it is now (at least for me) it crash. I don't know if it is because you enable the plugin in "Network admin" and the move to "another" URL for using it. Even when just using the "free" first part and try to create it can't do that, you get a message:
You don't have permission to access /osvs/wp-admin/admin.php on this server. Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
If you try that 3 times your site will go dead and need to contact your host to unlock because they see it as a treat. When I asked the to explain they say this: The mod_security found text 'varchar' under that plugins script and it detecting it as 'SQL Injection'.
And more info from my hosting company:
[Wed Feb 22 16:27:23 2012] [error] [client 220.127.116.11] ModSecurity: Access denied with code 403 (phase 2). Matched phrase "varchar" at ARGS:vipInfoB. [file "/usr/local/apache/conf/modsec_rules/10_asl_rules.conf"] [line "256"] [id "340155"] [rev "19"] [msg "Atomicorp.com UNSUPPORTED DELAYED Rules: Generic SQL Injection protection"] [data "varchar"] [severity "CRITICAL"] [hostname "xxmydomain.com"] [uri "/subdirectory/oneofthemublog/wp-admin/admin.php"] [unique_id "T0Vry2FP7hQACch-sXMAAABC"]
[Wed Feb 22 16:27:23 2012] [error] [client 18.104.22.168] File does not exist: /home/teamwexx/public_html/403.shtml, referer: http://xxmydomain.com/subdirectory/oneofthemublog/wp-admin/admin.php?page=wct_table_create
Your plugin seems to have everything that I need (premium choices) so I will be very hapy to buy the premium but it must work on MU-sites.
Take care / Lars