Cannot delete host

Cannot delete host

I have the free version of Manage engine eventlog analyzer. When I log on I get a message saying
This is a 5 host /applications free edition. You are curently managing 6 hosts/applications which is more than the permitted number, log collection will be temporarily suspended till you remove the additional hosts.
 
I had been playing wth it and had added the 6th host. I understand the 5 limit on the free version. But when I try to delete the 6th host it does not delete. What I mean by this is, if Im in the home tab and click the red x on the hostname it deletes but then when I log out and in again it reappears.
When I go to the settings tab and then click on host groups the X under the column heading delete is all grayed out. I tried to create a new group then move the host to that new group and then delete the new group, once the group is deleted it just moves the host computer to the default group. Which has a gayed out X.
When I go to setttings tab then host details and then check off the host name i want to delete and then click delete host, it deletes but then later just re appears.
 
Basically how do i remove one of the computers to reduce the number from 6 to 5. This is version 7.2.2 of the software.
 
thank you.
 

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