I keep trying to open my save (the save was made before the most recent update) and this is the log:

0.002 2016-03-09 17:59:49; Factorio 0.12.26 (Build 17762, win64)
0.002 Operating system: Windows 10
0.002 Program arguments: "C:\Program Files (x86)\Steam\steamapps\common\Factorio\bin\x64 ...