I just upgraded to Accordance 12.1 this morning. I had been running Accordance 11. When I upgraded, I can not open my old workspace. When I attempt to do so, Accordance crashes every time. For now I re-downloaded 11.2.5, re-installed it, and the workspaces are working fine.
PS For further info, I an on a mid 2011 MacBookPro, running 10.10.5 (Yosemite). And I have 16 GB of RAM.