Do you mean how do you stop maple from evaluating a worksheet that has code edited regions?
From the Maple help see Setting the Autoexecute Feature
To remove the autoexecute setting in a region
1. Select the region to be cleared
2. From the Format menu, select Autoexecute, and then Clear.
To remove all autoexecution in a worksheet, select Clear All.
Or is it that you don't want the startup page not to load?
For this one you could change the worksheet loaded at startup under the Tools->Options->Interface tab and apply globally.