When I go to "Add Data" within ArcMap, ArcMap is not finding the .csv/.exls/.txt files that are within ArcCatalog. I have added these file types under the Catalog options and the files are visible within ArcCatalog but not ArcMap. In fact, my co-workers have added the very same csv file to the very same map that I was trying to "add data" to. ArcMap won't see these file types that are in ArcCatalog.
Please note in the screen shot that the files are visible in ArcCatalog, but not ArcMap in the "Add Data" window.