I made the installation of the Adobe Creative Cloud 2015, as I intended the program on a Mac Mini 2012 with Yosemite and start the application blank window with no options open. Only see the title (Creative Cloud) and the gear icon with the options:
I have installed applications to perform updates do not appear. Creative icon also appears in gray in the menu bar of the operating system.
Quit Adobe Creative Cloud application .
1) Right click on Finder icon and select "Go-To Folder" option.
2) You will get a text box, type-in below command and then hit 'Return' key.( Do not miss ~ symbol)
3)Then navigate to Application Support>Adobe>OOBE. Open OOBE folder and delete opm.db file.
Once you had trashed Opm.db file , launch Adobe Creative Cloud app and check,
Please refer this document:
Refer this thread as well where similar issue was being addressed: