Problems with PCC in pix insight on a mac

[Astrolabe]

I downloaded the apass and Gaia files to speed up PCC in Pixinsight ( broadband here is glacially slow). Worked fine the first few times. Now PI won't read them and defaults to the server in Strasburg...a disaster. So I tried reinstalling them but now when I look at the files in PI they are greyed out even though when I look at the same files in MacOS they seem fine. I have pointed the apass and Gaia processes at the correct directories but PCC just won't read them. I have no idea whether this is a MacOS problem, a PI problem or just me being stupid. Can anyone help??