FWIW, the present beta(this morning) download ver 3.0.0.27157 seems to crash the internet connection stopping further chart downloads.
The version on google play , 2.7.2 has the back button problem as discussed in other posts
However ver 3.0.0.28346 which was available 10/10/13 @17.20 hrs seems to work very well on the nexus 7! Done a few hrs flying with it now and no problems found as yet.
Would be handy if the ver was included in the file name.