You can access the Check For Updates setting in the Control Panel to check if any software updates are available for the SI Client.
To access the Check For Updates setting, click the following icon.
If updates are available, you will be prompted to install them.
There is a setting in Company Information that determines whether non-SI Administrators will be notified of updates and allow for this functionality to update their SI Client.
Check out this article for more details about updating the SI Client.
If no new updates are available, you will be notified that your SI Client is up to date.