Drop-down list not functional

Hi!
I'm using AVG Free for a some time. After updating to 17.6.3029 (build 17.6.3625.0), I can't' access Quarantine and About items from Menu drop-down list. When I click on a button nothing happens. Actually, only items I can open are Setting and Help. I tried to fix it with AVG repair, but no success. I tried to re-install it (yes, I uninstall it first), but again same problem appeared. How to get access to all items on a drop-down list (most importantly to Quarantine and About)?

Milosh,
I appreciate your efforts in trying to fix the issue. I've sent you an email with further instructions to send us the diagnostics from your computer so that we can escalate the case to our Senior Team to analyze the AVG logs and provide you with a resolution for the issue. Please check your mailbox once.