How select right license key?

I have 3 licence keys (Awast Pro) for 3 computers. Now i reinstall operation system at one of them and don’t now what key i must use for setup AwastPro at this computer. How can i detect what key to use?

Do the three ones start the same way? I mean, there are two groups of characters separated by an “-”. Is the first group the same in the three?
If not, you can check the “About” dialog of the other two installations and check which licenses are being used.

Unfortunately, even the license manager does not “see” that number…

Thanks! There are really different. I saw that the head and tail this keywords are the same, but when i put there side by side, i saw that middle parts are different.

You’re welcome. Feel free to come back any time you need help or just to change experiences 8)