I recently upgraded to Ubuntu 18.04 and v9.0 FOSS. All went wel. I need a good backup solution and Zimbra Suite plus works great but not on Zimbra v9. I have bougth a license from Zextras but can't uninstall Zimbra Suite plus. I already tried to uninstall Zextras and Suite plus but after reinstall of Zextras the exception is still present.
I should have deinstalled Zimbra suite immediately but forgot and didn't have a new backup solution. I installed Zextras and this package complaints:

Exception occured:
stack trace:
com.zextras.lib.Error.LicenseNotValidForZextras: This license is not valid for ZeXtras Suite, please install Zimbra Suite Plus to use this license
I have created a support ticket but would like to ask if anyone has experience or a solution. The backup is working but on a trial basis.
Thanks in advance!
(Zimbra V9.0 P10 on Ubuntu18.04 and Zextras 3.1.5)