Just thought I'd let you know that I have once again put the 5-year 2011-2015 ACS summary files into Access database files. This makes it pretty simple to upload into SQL server or other RDBMS, if you need, connect to ArcGIS, or to simply run queries straight within Access.
I've only uploaded the U.S. file (helpful if you need Zip Code ZCTA data) and state files for Arizona and Virginia. However I have a script set up to import files from any state with just a few modifications so if you would like one of the other state files for 2015, let me know and I'll add it.
Here's the link:
There is some basic documentation in the Instructions folder, but let me know if you have any questions.