The other thing about 9.3 and later is the omission of certain installers from the console. LIke the content gateway used to be downloaded from the console, but now is obtained through this site. And reporting has been deprecated. The SSRS installer is now stuck at 9.2 and the ETL intelligence service has replaced it. SEG V2 is also moved from the console I believe as well.
I just performed an upgrade from 9.0 to 9.5. All went pretty well except once the update was finished, random Windows desktop devices were rebooting without warning. Luckily, we didn't have anyone complaining that they lost data or that it occurred mid presentation. I can see this turning into a pretty big gotcha if it happens to the wrong person at the wrong time.
Log Name: System Source: USER32 Date: 7/19/2018 3:13:36 PM Event ID: 1074 Task Category: None Level: Information Keywords: Classic User: SYSTEM Computer: ###removed### Description: The process msiexec.exe has initiated the restart of computer ###removed### on behalf of user NT AUTHORITY or SYSTEM for the following reason: No title for this reason could be found Reason Code: 0x80030002 Shutdown Type: restart Comment: The Windows Installer initiated a system restart to complete or continue the configuration of 'AirWatch Agent'.
Sounds like you have Protection Agent Automatic Updates turned on in all settings>devices and users>windows>windows desktop seems abrupt to reboot the machine without warning after auto updating the Agent though, not sure if Agent updates can be pushed normally you may want to ticket AirWatch about why the auto updater is silently rebooting
I test Db upgrades by restoring the DB to another SQL server and then running the db upgrades from 9.2 through 9.5 and verify no issues. You can then validate the DB version when done and weed out any possible issues.