Number of activations

I uninstalled and then reinstalled the antivirus version PRO, three or four times because he gave me of the problems I reported in other threads:
https://forum.avast.com/index.php?topic=171302.0
Now when I enter the activation code Avast tells me I have reached / exceeded the number of activations!
What does it mean?
I have to buy a new license because there is a limit to remove and reinstall your software?
After all, I benefited from the antivirus, installed on one PC of course, only for 30-40 days.
Can anyone tell me something about it?
Hello

Login at my.avast.com
Delete all devices
Wait a day
Add your current device

Hi cbino,

Enter your email address here to retrieve your license file https://www.avast.com/en-us/resend-license-paid.php
You can reinstall the license file as many times as needed, while the activation code cannot be used more than I believe 5 times.

OK! thanks
I removed the device.
Tomorrow I will provide a new installation.

I will recover even the license file as suggested moroni I thank!
Hello

I solved the problem by recovering the License file.
I believe that the activation code can be effectively used only a few times (maybe 5?).
Anyway thanks!