When the Advanced stock option is activated PrestaShop backOoffice (Preference > Product) , a new column is then added in Store Commander's products panel, called 'Advanced stock management'.
Using Store Commander's fast copy/paste feature, you can then activate advanced stock management on multiple products in a couple of clicks!
Configure a first product in your list by selecting 'stock management' mode (please refer to this article for detailed explanation of the various modes)
Right-click in the column and select 'Copy'
Select the other products you want to activate (CTRL or CMD keys, or the mass-selection icon if you wish to select them all )
Right-click and select 'Paste'
That's it. All selected products are now activated.