Sorry about that! We'll get it working again. It's most likely that the download failed and just didn't tell you (rude).
Here are the steps that should fix it:
1.) Hit the rectangles button in the lower left and hit "close all" to make sure nothing is running.
2.) Press the "Apps" button on the bottom of the home screen. Select "My Files".
3.) On the left go to "Download history".
4.) Remove all files by long pressing on an icon until it selects it, then select the rest. A button will appear on top that says "REMOVE". Tap remove.
5.) If the Mightier app is now started, pressing the gear button should show files downloading again. And then it should install properly.
If you continue to experience difficulties, please contact our customer support through firstname.lastname@example.org or 1-888-978-7495.