Okay, I know this is an old one and MJ is retired, but just for observation's sake:
I noticed over several months that Media Jukebox 14 displays all time dates 1 day (24 hours) behind the actual time (import dates and last played).
It only changed and started showing the proper date when installing & switching to either Media Center or back to Media Jukebox 12. I don't know if it's something particularly on my Windows 10 laptop that had anything to do with it, but I tried both rebooting, confirming and reconfiguring W10 time syncronization, and reinstalling + deleting all app-data folders. It kept showing all time fields exactly one day behind, specifially in that version. With or without VPN activation or altering time zones.