I am sorry that you have hit this problem.
I want to verify that the file you downloaded is named LabKey11.3-19003-Setup_includeJRE.exe. Is that correct?
One feature of the LabKey Server is that the server will periodically check if a new version is available(as you have seen) and it will also report all crashes back to LabKey (with important diagnostic information). LabKey investigates these crash reports to proactively fix any problems for the next release (you can read about these features at
https://www.labkey.org/wiki/home/Documentation/page.view?name=configAdmin )
As part of the crash reports, we send back the version of the software that you are running.
From this information, I see that you are currently running 11.2 - 17257. This is same version of the LabKey Server that you were running before you upgraded to 11.3
Is it possible that you accidentally ran the LabKey Server installer for 11.2-17257 instead of 11.3-19003?
In order to fix this problem, I would like to ask you to do the following
1) Please download the LabKey11.3-19003-Setup_includeJRE.exe installer again from
http://www.labkey.com/get_labkey_server.php.
2) Using the newly downloaded file, please execute LabKey11.3-19003-Setup_includeJRE.exe and perform the upgrade
This should successfully upgrade your server to the latest version of LabKey Server 11.3 (11.3-19003)
* NOTE: After double clicking on the installer executable, the very first dialog box (asking "Do you want to upgrade...") should say "LabKey Server 11.3 Setup" in the dialog header. If it says "LabKey Server 11.2 Setup", then please stop upgrade and respond on the message board. We can then jump on a web conference which will help me determine the problem and get your server upgraded.
-Brian