Likewise. I have a Samsung Galaxy Note Pro (12.2" screen), and just works fine. Also have MySword on my Samsung Galaxy S5, and works fine on that as well.
I downloaded my sword to my computer and when I tried to load it into my Samsung Tablet the following message came up on the screen,
"This program will damage this device"
Because you downloaded it on to your PC, and then moved it onto your Tablet, is the reason for you getting that warning. Had you used the Play Store all on your Tablet to download MySword, you would not have got that warning.
You see, Android regards apps as safe when downloaded and installed when the Google Play Store is used. Any other way one installs that same app, Android regards it as unsafe.
With that all said, there is a fix. In the Security settings on your device, click the Unknown sources checkbox, and that will "Allow installation of applications from both trusted and unknown sources," and you should be able to install apps you moved from your PC to your device without any hassles.
Trust this proves helpful to you.
Edited by APsit190, 22 May 2017 - 03:36 PM.