The Uptime Infrastructure Monitor version can be found in two locations:

The Uptime Infrastructure Monitor user interface

Login to Uptime Infrastructure Monitor. Click Support in the upper right area.
The version will be displayed in the pop-up window under the About Uptime Infrastructure Monitor section.

The install log file

Access the uptime-release.txt file in your base Uptime Infrastructure Monitor directory. This file includes the installed version history of your Uptime Infrastructure Monitor deployment.