from Source Code Archive
You can install/upgrade your Module manually by downloading the M2E Pro Extension source code archive.
The detailed instructions on how to provide an install/upgrade procedure manually can be found below.
Installation
Follow the next steps to install M2E Pro Module:
Step 1. Download the latest version of the M2E Pro.
Step 2. Disable Compilation in your Magento.
Step 3. Unpack the downloaded zip file in your Magento root folder.
Step 4. Clear browser (CTRL+ F5), Magento and all 3rd party extensions caches. If OPCode is used, it should be also cleared.
That's it! You have successfully installed M2E Pro on your Magento.
Provide the initial configurations for Extension and enjoy your sales on eBay/Amazon/Walmart Channel via M2E Pro.
Upgrade
Follow the next steps to upgrade M2E Pro Module:
Step 1. Remove the following files/directories in your Magento file system:
'app/code/community/Ess/M2ePro',
'app/design/adminhtml/default/default/layout/M2ePro.xml',
'app/design/adminhtml/default/default/template/M2ePro',
'app/etc/modules/Ess_M2ePro.xml',
'js/M2ePro',
'skin/adminhtml/default/default/M2ePro',
'skin/adminhtml/default/enterprise/M2ePro'
Step 2. Download the latest version of the M2E Pro.
Step 3. Disable Compilation in your Magento.
Step 4. Unpack the downloaded zip file in your Magento root folder.
Step 5. Clear browser (CTRL+ F5), Magento, and all 3rd party extension caches. If OPCode is used, it should also be cleared.
Our Congratulations! You have successfully upgraded your M2E Pro.