Virusdefinities verlopen - bijwerken geeft fout

Hi, I have the AVG antivirus paid version, does this link also work for the paid version?

Virus definitions expired - update gives error
Dear,
I am using AVG Antivirus Free version.
Today this red error message "The virus definitions have expired" "now update". When I click on update, this again gives error message "Invalid file signature, the installation will be terminated". Update program also gives this error message.
Restarting also gives no result.
What should I do to correct this problem?
Can someone help me further?
Thanks in advance.
Best regards,
S. T.

Geachte,
Ik gebruik AVG Antivirus Free versie.
Vandaag geeft deze rode foutmelding "De virusdefinities zijn verlopen" "nu bijwerken". Wanneer ik klik op bijwerken geeft dit opnieuw foutmelding "ongeldige bestandshandtekening. De installatie wordt beëindigd". Ook programma bijwerken geeft deze foutmelding.
Heropstarten geeft ook geen resultaat.
Wat moet ik doen om dit probleem te verhelpen?
Kan iemand mij verder helpen?
Dank bij voorbaat.
Mvg,
S. T.

Sophie,
We're here to help, but can you ask your questions in English please?

Hello Rodolfo,
We will help you sort it out. The above link is only for AVG Antivirus Free.
May I know what is the exact issue you're experiencing with AVG Internet Security virus definition updates?
Is there any error message? If yes then please share a screenshot of the error message to proceed further.
You can post the screenshot here on your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.
Regards,
Alok.

Thank you for your response in English, Sophie. 

I appreciate your efforts, please try to download abd run this latest version:  http://files-download.avg.com/inst/mp/Antivirus_Free_1817.exe and check if it  helps. We are here if you need further help.

Sophie,
We're here to help, but can you ask your questions in English please?

I had the same problem. I have the link installed and everything is OK.
Thank you very much, Ranjani.
Best regards,
Eddy