When I install Avast Premier, it switches back to Avast Free AntiVirus

Avast Free Antivirus / Premium Security
1

This problem happend 3 minutes ago. Avast Premier turns into a Free AntiVirus?! What should I do? :-[

My PC Specs: (In case you wan’t to check it)
Acer Aspire ES 11
ES1-132-C7XC
Windows 10 version 1703
Intel Celeron Quad Core Processor N3450 @1.10GHz
Intel HD Graphics
x64 based processor 64-bit operating system
4GB ram (3.83GB usable)
270GB memory

2

First check your licence.
are you using 30 days trial of Avast Premier?

3

Yep, I’m using it.

4

You can only use that free trial once. Once used, it can’t be used again.