Or can I backup my app data and use it through an emulator?

Honestly, I tried everything to solve a certain problem and this... is my last resort.

Long story short:

> I downloaded the Hidden Camera app in my Lumia 535 Windows 8.1;

> The app stores videos in its own folder and allows you to transfer to a computer through Onedrive, FTP and Dropbox;

> None of those worked;

> The files don't appear anywhere but in the app's folder;

> I tried projecting my screen to the computer, but god knows why it doesn't work too;

> I tried downloading Interop Tools but, as of today, ERROR 805a8011 appeared all of a sudden;

It seems like the universe is conspiring against me. Nothing works and for apparently no reason.

Can any of you help me? I want these files in my computer.