Bought version 4.2.0 and cannot for the life of me get it to install on my BB. Don't have a problem with installing any other apps. Have the receipt, so I know I purchased it but every time I try to get the upgrade, it installs the current version. Contacted dev. and they just told me to uninstall app and App world, which I did. Still - nothing. Can't find anyone to contact at App world. Now what? Really enjoy the app, but the dev. said the instructions they gave me are what generally works. Anyone with similar problem?