If you have an iExplorer 3 license and don't plan to upgrade to major version 4, you can download and reinstall iExplorer 3 from either of the links below: The icon for iExplorer 3 has a blue background while iExplorer 4's icon has a white background. To find out which major version of iExplorer you have installed, simply look at the color of the app icon. You won't be able to upgrade to iExplorer 4 using Check for Updates in iExplorer 3. IExplorer 4 does need to be downloaded as a separate, new app since it's a new major version and is considered a new product. iExplorer 4 also adds support for macOS 10.12 Sierra, 10.13 High Sierra, 10.14 Mojave, 10.15 Catalina, and 11 Big Sur.

If your 25 digit registration code is coming up as Invalid when trying to register iExplorer, you'll first want to make sure that you are definitely entering it into our iExplorer app and that you're using the major version of iExplorer that you purchased since an older iExplorer 3 license code will be rejected as Invalid if you try use it in iExplorer 4 since it's an all new major version upgrade that requires a new license code and adds iOS 10-15 support and several UI improvements and performance upgrades. For general instructions on how to register and unlock the full version of iExplorer, refer to our article about How do I register iExplorer?.

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