[DCP-o-matic] Changes in projector format between 2.12.x and 2.14.x?

Hi Carl. Are there any changes in the format of the metadata.xml DCP-o-matic project file between 2.12.x and 2.14.x? I have a bunch of DCP-o-matic project files made with 2.12.10 but not encoded yet, but would like to upgrade to 2.14.8. If I attempt to open these old projects in DOM 2.14.8 in order to "Make DCP", should I expect any incompatibility/problems? Or may there be problems if I encode these old projects via command line? dcpomatic2_cli --config /path/to/config /path/to/dom/project Cheers! Jim