DigitBlues

I have similar situation when I try to use BA to install Melodyne through the Add-On. The screen just showed grey-out app and install check boxes. Clicking those produce no download activities. I later discovered that I have to delete the entry in the registry to let BA not to think the App is already installed. Open the Registry Editor - Computer HKEY_LOCAL_MACHINE\SOFTWARE\Cakewalk Music Software\Cakewalk\Installers then examine the key listing under installers and identify the one that is not running/not on your computer or not installed successfully by you. That key could be the one that BA thought it has already been installed and therefore not download. I found one that has no value set and deleted it. After the removal BA installed the App without problem. I hope this is your problem too.

I have exactly the same problem reported by Marcello. This problem re-surface a year later. I hope Bandlab staff is able to look into their server again. Peter