Yes. I was finally able to solve the problem. I went into "Data Sources" and clicked the button to pause indexing (although it wasn't indexing at the time anyway). Then I clicked it again to start indexing. At that point X1 started reindexing all of my files. At this point I'm back to 182,000 items indexed.
I'm not sure what caused the index to empty. The fact that it happened when I updated X1 makes me think the update was the culprit. But it seems like it's working again now.
I'm not sure what caused the index to empty. The fact that it happened when I updated X1 makes me think the update was the culprit. But it seems like it's working again now.