Removed support for older versions - BETTER APPROACH
Please, TeamViewer developers, CONSIDER THIS SUGGESTION regaring dropped support of older versions for paid customers:
1.) Re-enable support for older versions on your servers for another year!
2.) Add feature of REMOTE UPDATE, so we will have time AND TOOLS to upgrade remote clients to compatible version before you shut down support again.
This is the only acceptable scenario for PAID product, as per my point of view.