Follow the next steps to install M2E Pro Module:
Step 1. Install Composer Installer. It automatically installs and upgrades those modules which are provided as depended packages in the Composer's project of your Magento.
Step 2. Provide the Composer Installer as dependence to the composer.json file of your project. Please, check the example below:
Step 3. Provide the source code of M2E Pro as one of the dependencies to the composer.json file. You can check the example below:
As a result, the source code of M2E Pro will be automatically installed/upgraded via Composer once the composer packages are updated. Composer Installer will automatically run necessary actions to correctly configure the files of the Extension for Magento v1.x
Step 4. Flush manually all Magento cache (System > Cache Management by pressing Flush Magento Cache and Cache Storage buttons) even in case the Composer Installer has already done it during the installation process.
That's it! M2E Pro has been successfully installed.
Provide the initial configurations for Extension and enjoy your sales on eBay/Amazon/Walmart Channel via M2E Pro.
This instruction does not contain any recommendations for enabling the Maintenance Mode in your Magento. The decision is up to you.
If you face any issues during the installation process, read this article to find the solution.