You're welcome!
There's just one more thing to do to completely solve the problem, change the default button so that anytime you drop a button it will be rounded.
So here's what you do:
1. Do not select any control on your form and click the Design Tab > and select Button
2. Repeat the steps from my last post, i.e. go to Format tab on the ribbon > look for Change Shape > select an appropriate shape
3. Now click anywhere inside your form, just a click don't draw, and your default button will be set.
Test it to make sure that all newly drawn buttons now have the rounded edges.