With the new release of Version 1.44 on 11/4/2013, since the app tells Android that it wants to download all files with the .vfr extension, Android will some times ask if you want to use the VFR app on something completely unrelated. Here is a work around until we can get Android to behave.
When you start
gmail, it might prompt with "Complete Action Using" screen. Set the
bottom button "Use by default for this action," , then select the proper app to run. Then it won't bother
If this does not resolve the issue, please call me at 650-323-0148 anytime.