Visit their website and look through what countries are supported, if not, then simply ask if it can be implemented, not every country can be supported for obvious reasons. (they also have a forum...)
Fresh Store Builder does work with Amazon India - check out more info here: http://www.freshstorebuilder.com
the problem with stores with FSB or AOM , you can not apply with them for a new Amazon affiliate account. As soon as you get a sale or some clicks, Amazon will send you an email that says : we don't accept those kinds of stores. I am flippa seller and i know what i am talking about...
Amazon do accept FSB stores providing they have unique content on them. 100% of the members who followed this guide got an active associates account: https://guides.freshdevelopment.org/article/applying-for-an-amazon-associates-account/
Here is one of our members getting his best day ever with commissions on 11th July 2015 with Fresh Store Builder: https://www.freshmarketingforum.com/threads/new-store-some-proof-fsb-works.7398/page-3#post-37671
I've actually been looking at the FSB and will probably pick it up in the next while... In the meantime, do you still launch a fair amount of Amazon stores? If so, we are paying out affiliates an additional 15% on top of Amazon's 4-6% Let me know Jeff