Problem with Inbound Now's Feb 24 Upgrade

Hello Folks,

I purchased the Upgrade for Inbound Now, version 1.2.5, the $99 level. The plugin installed fine. I pasted in my API number fine. When I tried to open any of the CTA or landing pages that were available, I got a blank page reading:

Error : PCLZIP_ERR_BAD_FORMAT (-10) : Unable to find End of Central Dir Record signature

I tried one of the standard themes, I deactivated all the other plugins, I went through and took out deactivated plugins that I didn’t need. Nothing worked.

Inbound is not responding. Can anybody help?