I am currently on 2.6.2.6 and whenever i click to update it does not work and stays at 2.6.2.6. Now that i had accidentally updated the minecraft instance I now cant access it
I had the same issue. I solved it by running the update in PowerShell (Windows install) instead of the GUI. Commands are the same in Linux terminal.
Run PowerShell as admin
cd to AMP install location
‘.\ampinstmgr.exe list’
Find the name of the AMP instance manager, default is ‘ADS’
‘.\ampinstmgr.exe upgrade ADS’
‘.\ampinstmgr.exe restart ADS’
Upgrade ran perfectly outside of the GUI, and now the GUI shows the instance manager is updated past 2.6.2.6 to 2.6.4.0 and I can access my instances again. Yay.