Hello, i can't use the emclient on my computer.

I get the message: “This computer can not be activated due to a violation of our license policy…”
It worked perfectly for 1.5 years.
I don’t know what is the violation

Violation of the license policy means that you are suspected of using eM Client for commercial or business use with a Free License.

Did you get an email from eM Client informing you of this?