Starting in 2021, Kaspersky moved to a server-side verification system. Even if you reset locally, the Kaspersky cloud would recognize your Hardware ID (HWID). The "31029" reset stopped working permanently around October 2021 because the activation servers started refusing trial tokens for previously registered hardware.
Most trial resetters, including KRT Club, work by manipulating the Windows Registry and deleting specific hidden files where the antivirus stores its installation and activation data. The typical manual or automated workflow involves: kaspersky trial reset 2019 krt club 31029 atb updated