You don't need a license key, but it's written in the info.

in version 4.2 the battery is excessively consumed. in version 4.17 5-6 days. version 4.2 max 2-3 days

How do you use Windows? Does system protection prevent the installation? In W10, the protection must be turned off

http://harduino.ru/index.php/en/download
on this page download downolad.zip and install. tested functional

ahoj sofware musisi nahrat programom
flash_download_tool_3.9.2 potom alll ok