After un-tarring the OB19.3.1-NBL.tgz file and getting the contents installed, I noticed that the version of AWIPS that was being installed was actually 19.2.5. I was able to get 19.3.1 installed via the ADE package, but wanted to make you aware of this in case 19.2.5 was posted in error.
Thanks for the notification, it is indeed an error. Please see the notice on the front page of the AWIPS Technical Library. I should have an update by next week. Apologies for the inconvenience.
Thanks so much, James -- please stay safe and sound!