Upgrade tiki from control panel stuck on version 19.0
I have used the tiki installer (I use the install upgrade not replace database) to try to upgrade from 19.0 to 20.
when you get the welcome page for the installer it says welcome to the tiki 19.0 installer
you then get the install & upgrade page, I choose upgrade automatically upgrade your existing database to version 19.0
you don't seem to get offered version 20 in the upgrade process
it loads and runs okay but when you check the control panel / general it still shows up as version 19 and offers 20 again. Is there a way to force or direct the installer to the next version.
I am running tikiwiki in a bitnami stack on AWS ec2 server.
Thanks in advance