BlocklauncherPro started to automatically close moments after launching on my Kindle FireHDX. (I am using version 0.10.) Tried many suggestions to fix with no luck, and Amazon support could not get an answer either. Because Blocklauncher free is not in the Amazon app store, I assumed it was not available for Kindle. Google saved me when I found a post about the problem and realized I could get Blocklauncher free from another source. It works great! TMI, here I come!
BTW, to give credit, the post was at https://github.com/zhuowei/MCPELauncher/issues/184 and I used their link to download Blocklauncher free (http://tinyw.in/bl)
Can someone help it also closes on mine.