How to upgrade M2E Pro on Magento Marketplace? [for Magento v 2.x]

* If your M2E Pro was initially installed via Installation Tool, please complete the following actions first:

1. Navigate to System > Web Setup Wizard > Component Manager in your Magento backend.

2. In the Component Manager grid, find and Disable M2E Pro Module.

3. In your Magento root folder, Remove the following directory:

'/app/code/Ess'.

Note, only the code of old M2E Pro version is removed. This action does not affect your existing M2E Pro configurations. All M2E Pro Listings, Policies, etc., which you have previously created, will be saved.

4. Install an Extension via Magento Marketplace.

The latest Module version, including your existing M2E Pro data, will be installed from Magento Marketplace. The future M2E Pro upgrades via Magento Marketplace should be performed according to this instruction without any additional actions required. 

* in the other cases (for M2E Pro Instances initially installed via Composer.json, GitHub, or using old Magento Marketplace packages), please complete the next steps:

1. Navigate to System > Web Setup Wizard > Component Manager in your Magento backend.

2. In the Component Manager grid, find and Remove the following records:

'm2epro/multichannels-module', 
'm2epro/ebay-amazon-rakuten-sears-magento-integration-order-import-and-stock-level-synchronization',
'm2epro/magento2-extension'.

Note, only the code of old M2E Pro version is removed. This action does not affect your existing M2E Pro configurations. All M2E Pro Listings, Policies, etc., which you have previously created, will be saved.

3. Install an Extension via Magento Marketplace.

The latest Module version, including your existing M2E Pro data, will be installed from Magento Marketplace. The future M2E Pro upgrades via Magento Marketplace should be performed according to this instruction without any additional actions required.