The average crash rate for each app version shown in the analysis page is based on the three most recent versions.
The three most recent versions are the three with the recent registration date with SmartBeat. The registration date is automatically recorded as the date when the app with the SmartBeat SDK is launched and the data first arrives in the SmartBeat system. The registration date can be checked in the "App Versions" section of each app's settings page.
In the "App Versions", you can hide any version. The latest three versions will be displayed in Analysis tab, excluding the hidden versions.