Sync Plex Database between Windows Windows and Raspberry Pi

I'm currently using 2 Plex Media Servers, one at home running on a Windows 7 machine and another PMS when travelling running on a Raspberry Pi 2. Everything works mostly fine so far, Raspberry is not powerful enough for trasncoding but that not an issue for me.
The only inconvenient I'm facing right now is how to synchronize 2 plex databases from different computers running on 2 different OSs. Every time I travel, I manually copy all my media library (plain MKV files) from my Windows 7 HDD to my external HDD, which is used by Raspberry, so that actual files are allays up to date, but I wasn't able to find a way to sync plex metadata. Should I manually copy AppData folder? is there any way of dining this in a more efficient way?
Sorry for my bad English.
Many thanks in advance and regards from Argentina.