How does this or that program understand that it has already been used?

Question

Avocode

For example avocode.

I cleared the browser cache, deleted avocode from the computer, cleaned the temp folder on windows, and even reconnected the Internet to change the IP address (the provider issues a dynamic IP).

After that, I re-registered from a new mail, and everything seems to be fine and working, but the very next day they write like your trial version has ended, although in fact its period lasts 14 days.

How did avocode know that I had already used their product for 14 days, despite the fact that I changed my authorization data?

Answer 1

As an option, write a unique user ID and program instance ID to the project. And so the browser effortlessly gets 20-30 universal characteristics of you and your computer, the native code is much more.