If you do not have an Extended Edition license, you are in Evaluation mode of the Extended Edition features. You will be able to use sufficient parts of the Extended Edition in order to understand how it operates, however it's use will be restricted:
you will be able to use the Administration functions, however you will not be able to run any of the generated scripts.
the Object Compare can be used, however the compare all objects in schema function will be disabled
the Data Loader can be used, however will be restricted to loading 100 rows
the Data Compare tool can be used, however will be restricted to comparing 100 rows