Glad you like the app, thanks!
It seems like you have two separate issues. Let's please keep them separate when we're talking about them, so I don't get confused
First, your camera issue - you're having trouble connecting your Panasonic GH4. You said you have an FTP connection from your GH4 to your macbook. But this doesn't make sense to me: cameras do not support FTP, and I see no evidence online that the GH4 supports FTP of any kind. You're probably using some Panasonic or Mac software to get the photos off of your GH4 -- are you using a cable? You're going to have to wait until the next version of WiFi Booth is released, which will (for the first time) support Panasonic cameras, including the GH4.
Second, your printer issue - if blueprint is immediately disconnecting after the ipad connects, then can you please open the app store on the device where *blueprint* is running (your iPhone i'm guessing), and go to the app store updates tab, and see if you are able to update Blueprint? It needs to be kept up to date.