I am interested in buying à line 6 amplifi 150 because of the diverse guitar amp posibilities(settings) that can be plugged in trough the app. However i was wondering, before buying, if these settings stay in the amplifi 150 if the battery of my iPad/iphone or Android device gets depleted, and / or the Bluetooth link with the amplifi 150 get interrupted while playing... Another question is if i can install software on my pc to do the same as with the app?