You can Enable or Disable 'Manage Stock Level' with a Product Update CSV. From your Inventory Page, select Update Existing Products from the Bulk Manage drop-down menu. Click on 'No, I need to download a list of my products'. Select the 'Manage Stock' attribute under the Product Attributes section. Click on Build Product Sheet and then Download Product Sheet to download a list of your products. In the Manage Stock column of the downloaded CSV file, set the value to TRUE if you would like to Enable 'Manage Stock Level' or FALSE if you would like to disable 'Manage Stock Level'. Save the CSV file and click on Upload Filled CSV on the same page on TradeGecko to upload the CSV file and complete the process.