As to your question, I think MEP "defaults" to whichever locale is chosen when you install the program. Region 2 suggests UK, I think. Assuming you live in the UK and chose that as the selected language when you installed MEP I'd be very surprised if your discs are not compatible with UK players. So, perhaps, a little more detail about the format of your original video files, your chosen export format, etc., please.
As far as Movie Edit Pro is concerned, you really don't need to think in terms of region codes at all. Region codes really only apply to commercial DVDs. What you need to be concerned with is which video standard does the DVD player that you want to use support. So basically it is NTSC or PAL. For example, Europe and Japan are both considered to be Region 2, Europe uses pretty much the PAL standard and Japan uses the NTSC standard yet both are Region 2. If you burn a DVD using the NTSC standard it will not likely play on a DVD player in Europe (unless it is a multi standard player). If you burn a PAL DVD, it will likely not play in Japan or the U.S. (which is actually Region 1) for the same reason. So regions are really meaningless for the purpose of this discussion unless you are creating a commercial DVD and only want certain copies to be able to play in specific geographic regions. Just know which video standard your player uses and make sure your program and project settings are set up to handle the right video format.
I hope this helps,
George
ps. SECAM is a third video format which is pretty much obsolete but pretty similar to PAL so if you say live in France where SECAM was once popular and have a older player, I would try PAL.