Your License for ZeXtras Suite and all of its modules is expired

hello, world!

i received this messages today:

This is an automated notification from ZeXtras Suite.
Your License for ZeXtras Suite and all of its modules is expired.

All the ZeXtras Suite modules and components were forcibly disabled.

please explain, what this means?
can i use chat whitout purchase?
th, Sergey.....