There are 2 ways to approach this:

Using Softaculous
SilverStripe Administrator dashboard

1. Using Softaculous
Login to your cPanel dashboard and search for "Softaculous Apps Installer". Click on Softaculous Apps Installer.

Next, click on the box icon as highlighted below.

Scroll down until you can locate SilverStripe. You shall see which version is installed as highlighted.

2. SilverStripe Administrator dashboard
Login to your SilverStripe administrator dashboard.

Click on this button as highlighted below and you shall see your SilverStripe version immediately.

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