Please test git commit 312ad54c13d8da2a72e767fc93141eff9f6454d9.

The following steps should be performed:

1. Install an old version of the app. It doesn't particularly matter which version as long as it's older than the test build. I'd suggest using the current SimplyE release, as this would be the one from which users would be upgrading.
2. Borrow and fulfill a book with DRM in NYPL's collection. Make sure it opens to read. Borrow a DRM-free book in NYPL's collection (like Moby Dick). Make sure it can open to read. Switch to the SimplyE Collection and download any book (DRM-free)
3. Install the new test build, replacing the old app.
4. Ensure that the books downloaded in step 2 can still be seen in My Books and can still be read.