[Сергей]

When you buy FE key it looks like this:
1294-SERG-Order-T-2024-02-01-0-FE-1Y-125234

When you use FE first time, you enter key in Flash Extractor / Props / Key
Flash Extractor make online activatoin of Key
And add additional characters to the end of Key

Example:
1294-SERG-Order-T-2024-02-01-0-FE-1Y-125234/004d2a46455f315917d43d

Save this new key from Flash Extractor / Props / Key
When you reinstall windows or change computer
You can enter this new key and FE will not need do online activation again
So, you can use it even if FE website is down