Bug found in TRIfA apps ( while i click 2 times or 3 times on exit button apps is crash )

Expected behavior

open the application and when you want to close this application simply click on exit button and apps should be close from your phone

Actual behavior

when i open the application and click on exit 2 times or 3 times apps is crash you can watch in bug video

How to reproduce

• Download the install the apps
• open the apps
• click on manu
• click on exit button 2 times or 2 times
• note bug
• Browser: TRIfA version 1.0.16
• Operating system: android version 4.4.2
• smart phone GALAXY Note 3

Recording Of The Bug