License code is only for the dmg version downloaded from our website. If you can't find "Enter License", please make sure that you use TechEDMentor dmg version.
If there are different versions of TechEDMentor on your device, we recommend that you uninstall all, restart your device, and redownload the latest verison from here.
Then enter your license by tapping TechEDMentor on the main menu and click Enter License.
Note:
FYI: Difference between TechEDMentor.dmg and TechEDMentor (Apple Store)
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