For the moved game, it's not really a problem for MrNFL - The stats file you import for week 2 can delete the game and the stats file prior to the re-scheduled week can add it to the schedule.
For MrOfficePool however it is a bit of a problem.The program keeps player picks in order, not really caring what team a person picks, only if they picked home or away, so if you remove a game in the middle the games below will all move up and the selections will be wrong.
For now, I suggest you just remove that pick from each persons picks so no points will be awarded.
There will be an import file for MrNFL (which will delete the game) and one for MrOP (which won't) be sure to import the MrOP one because if you delete the game all the player picks below that game will be wrong.