Many of my button links have changed by importing my project in V2. The color, the border and the padding is not correct. Is there some logic behind this and a quick fix?

Open a support ticket if you can Linda with the original project and then some screenshots of what got changed and we can look into this.

Here is what is going on. Looks like you created this project in Layout Maker using Bootstrap 2.3.2 and then saved that into RSD. With RSD 2.0 we have removed the Bootstrap 2 wireframes which all your buttons relied on for their default styles. What you will need to do here is re-apply your styles (like background color) to these buttons and you will be good to go.

I did and it works now fine.