I have used MPE for many years, 15 or so. I have always had it set to automatically sync my phone to the desktop at the house when my phone connects to the Wifi. It's automatic and I don't have to worry with it at all. Once a month I will do a manual backup of my phone, just in case something happens to it.
Lately, I have been spending weeks at a time away from home and I have my laptop with me. I want to sync to my laptop when away but also sync with my home PC upon my return. I'm afraid that the messages and files that are synced with my laptop will not transfer over to my PC if they have already been synced with the laptop. There has to be something that tells the phone that the messages are already synced and can this be turned off?