Blue LED means it is loading the Platform image. If it can't download the Platform code the blue led never goes away..
Your Diagnostic Tool Version is a bit older.. one new option is "Download latest" which would help you I think.
- Navigate to http://[Your Hub IP]*/hub/cloud/updateDiagnosticTool, wait a few minutes (you will not see a progress report), and the latest Diagnostic Tool version will be downloaded if needed.
found here:
Since this is usually automatic, I'm wondering about Internet access for this specific hub too. If you're unable to download the diagnostic tool, then you should look at blocks in your network.