In order to schedule the recalculate to run at night the following must happen on the server.
1. Add the Govcollect folder to the path Statement.
a) Right click on the Computer Icon.
b) Select Advanced System Settings.
c) Click Environment Variables.
d) Double click on Path in System Variables.
e) Add the path for Govcollect to the path statement.
Create a batch statement with the program name for the recalc.
Go to Administrative Tools on the server
Select Computer Management
Select Task Scheduler
Build a task to run the Batch statement you created.
If you have problems with this Google Scheduled Tasks for Windows.