I got an even easier method to fix the calander if you have the advanced configeration tool.
Go into the ACT, click menu tab at the bottom right, select more settings, then select key maping, under the left soft key tab it says calander. Select the arrow in that box and drag down until you find the program calander. Select ok exit the ACT and then your calander will be remaped.
Sorry if any of this is confusing I have been up all night.