There are no such things as "stupid" questions. However if you think your question is a bit stupid, then this is the right place for you to post it. Please stick to easy to-the-point questions that you feel people can answer fast. For long and complicated questions prefer the other forums within the support section. Before you post please read how to get help
It is, however, recommended to know the CLI-methods in case the environment file gets deleted or corrupted. Plus, using the export or set commands is much quicker if one is to define only a single variable.