This article explains how to identify the existing environment is synchronized persistence or shared persistence in 3.1 SR2 version onwards of Qlik Sense.
There is a way to find whether existing environment is shared or synchronized persistence.
Please navigate to "C:\Program Files\Qlik\Sense\Repository"
You will find a XML configuration file named "Repository.exe"
Open the file in Notepad or Word with an option "Open with".
Scroll down till you find the below line: <add key="SharedPersistence" value="true" />
If the add key="SharedPersistence" and value = "true", it depicts that the Qlik Sense was installed with shared persistence, if the value = "false", it depicts that the Qlik Sense was installed with synchronized persistence.
Please find the screenshot below for the reference purpose.