It looks like Jomres is out of business.
His website is down!
If you have Jomres you will not be able to see your Plugins in the Plugin Manager, or use Jomres at All.
Jomres has a good run over the years. Most of the people who tried Jomres went on to a different online Booking System.
Good Luck!
I told you Jomres is JUNK!
Errors:
Could not query the updates server
Uh oh, Can't get a list of plugins from the plugin server. Is there a firewall preventing your server from talking to http://plugins.jomres4.net ?
Deprecated: Required parameter $host follows optional parameter $user_id in /home/utjmedia65/jomres.utjmedia.com/jomres/core-plugins/channelmanagement_jomres2jomres/functions.php on line 72