AppImage provided from Cafe #10 won't run, crashes.

[Jesse DuBord]

Thanks to JB for offering to let testers download his AppImage version 
of Kdenlive for testing. Unfortunately, however, this crashed after I 
tried to open it from the Terminal. Steps to repeat the crash:

(1) Download the Kdenlive AppImage file from the link JB provided (file 
name Kdenlive-git-x86_64.AppImage).
(2) Open Terminal.
(3) cd Downloads/ && sudo chmod +x ./Kdenlive-git-x86_64.AppImage
(4) ./Kdenlive-git-x86_64.AppImage

Program briefly opens, then crashes. Terminal produces this output:

"This is a beta version. Always backup your data"
trying to load "/tmp/.mount_BeDEqK/usr/lib/qt5/plugins/kf5/kio/file.so" 
from "/tmp/.mount_BeDEqK/usr/lib/qt5/plugins/kf5/kio/file.so"
Cannot make QOpenGLContext current in a different thread
/tmp/.mount_BeDEqK/AppRun: line 49:  6836 Aborted (core dumped) kdenlive $@

(Tested on Ubuntu 16.10 x64, Unity 7.5.0 desktop environment, Nvidia 
proprietary 367.57 drivers, 4.8.0-26-generic kernel, KDE Frameworks 
5.26.0, Qt 5.6.1)