I've used WiseStamp in the past and as a non-tech person, was a little spoiled with plug-in templates. Overall and for the cost, it was well worth the purchase.

I see this is in Beta so I hope you don't mind my suggestions:
1) the examples shown on AppSumo helped me a ton in seeing all of the options I could create. Maybe include those visuals on the setup page to inspire (and educate) users.
2) please consider creating templates for users to use for a quicker setup.
3) please consider adding animation. I loved having my profile pic & logo switching back and forth in my email signature and it grabbed people's attention.

Thanks for the product!