Don't reuse timerid since on iOS and Android it is not an index to a timer table... it is the actual handle to the timer object. After calling dw_timer_disconnect() on it, the object will be invalid so set the timerid variable to 0 which is an invalid handle.

[Desktop Entry]
Name=Dynamic Windows Test
Exec=@prefix@/bin/dwtest 
Terminal=false
MultipleArgs=false
Type=Application
Categories=Application;Development;X-Red-Hat-Base;