Originally Posted by DiapDealer
Skip the Apk Share backup step entirely. It's an unnecessary complication. ES File Explorer has the ability to back-up applications already. And with Dropbox installed on your BlueStacks device, you can then upload the backed-up apk to your Dropbox all from within BlueStacks. Then...
Download directly to your Fire with the Dropbox app installed on your Fire ... or download from Dropbox to your PC for sideloading via usb. Bada-boom, bada-bing.
I have not tried this yet but thanks so much for your work!