AbleCommerce Shopping Cart Software

We would like to have 2 stores mystore.com/en/ and mystore.com/fr/ running under same AbleCommerce platform.
We want both stores to use independent global store settings. In AbleCommerce database every table hast StoreId. So I belive multiple stores are supported.
How can I active and use multi-store feature?

Multiple store feature is not available from within single database is not available yet. Here is a thread that may help you regarding running multiple stores from single database.
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