i get this message when I hover over a grayed out install:
cannot install an older version
2.0.0.2380 - Dec 5 2014 Install Maintenance release
and I also see the following in my logs:
Request for https://192.168.0.100:9090/api?mode=queue&start=0&limit=0&apikey=&output=json failed certificated validation. RemoteCertificateNameMismatch, RemoteCertificateChainErrors
Any ideas?