You'll probably now have to update the P3 firmware by loading the file onto the SD card and waiting while it beeps etc for up to 30 minutes.
There have been a few reports of connection issues due to mismatch of app and firmware.

When the P3 is on latest it's likely the app will advise your controller needs doing too - which is done over wifi through the app.
There doesn't seem to be any particular worries with the latest firmware and as usual they list a few minor improvements to stabilty etc.

It's best to switch off auto updates for the app which is easy on Android - not sure about Apple.