No upgrade available for 19.04 from 18.10 [duplicate]

I'm pretty new to running linux, but I know that 19.04 was released today and I wanted to upgrade from my current 18.10. However, when I follow the release notes here: https://wiki.ubuntu.com/DiscoDingo/ReleaseNotes#Official_flavour I get the message "The software on this computer is up to date". I made sure that my update settings are set to "any new version" and "normal" in the /etc/update-manager/release-upgrades file.

What am I doing wrong?

Thanks for the help!

Side note: I had to disable this PPA: http://ppa.launchpad.net/nvbn-rm/ppa/ubuntu because it would cause errors in apt updating. Do I need to re-add it? If so how do I do so without it giving me an error?

Edit: I have followed the procedure recommended in the documentation which is identical to the suggested duplicate, but I am not given the option to upgrade. I have not yet tried the

do-release-upgrade -d 

option as I don't want to upgrade to the developer version.

Do not forget to make a backup of current system to prevent data loss.

Then do the following:

1. Make sure that you have the following contents in the /etc/update-manager/release-upgrades:

   Prompt=normal

   or from Software & Updates (software-properties-gtk) GUI tab Updates:

   

   set Notify me of a new Ubuntu version to For any new version.

2. Switch to the Main server in Software & Updates (software-properties-gtk):

   

3. Install all updates to your Ubuntu 18.10 by running:

   sudo apt-get update
   sudo apt-get upgrade
   

4. Reboot and then use one of the solutions

   • GUI solution:

     update-manager
     

   • terminal solution:

     sudo do-release-upgrade
     

Notes:

1. This method ended with warning message:

   Could not install 'linux-image-5.0.0-13-generic'
   The upgrade will continue but the 'linux-image-5.0.0-13-generic' package may not be in a working state. Please consider submitting a bug report about it.

   triggers looping, abandoned

   and I have to run sudo dpkg --configure -a before reboot to prevent lock-up of new 19.04. Maybe it is VirtualBox guest issue. Reported as bug 1825420.

2. really I'll recommend to wait 2-4 days for official stable method with any mirror.