Logic Pro x - additional content downloads and installs but it won't show up in my Logic Pro X. Where is the add'l content downloaded and how do I activate on Logic Pro X?

The additional content downloads and installs, but it won't show up in my Logic Pro X. I cannot find the "Library" folder where this additional content is downloaded to and can't seem to activate the new loops and instruments in my Logic Pro X (i.e. loops are still greyed out). Any solutions?