Teamviewer 12 business can I log into computer with 13 installed?

alanteamviewer

I have a teamviewer 12 business license.  I use this to serve my residential customers.  One just upgraded to teamviewer 13.  Will I be able to log into their computer with my teamviewer 12?

Thanks,

Alan

SEH

No you have to buy the upgrade. Or ask the customer to go back to 12