Hi Stephen
It’s not just the feedback button that is located in the bottom right of the screen, but the whole interaction takes place there as well. Although one could move the button using CSS, I would really recommend not doing that. Clicking on a button on the left hand side and then filling out the form on the right would be very confusing for users.
If you want to try this out nonetheless, you could add some CSS like this in the Customizer’s Custom CSS section:
#user-feedback-init-button { right: auto; left: -3px; bottom: 60px; }
Note that on https://www.ads-software.com/plugins/user-feedback/advanced/ you can download the beta version of a newer release of User Feedback (“Development Version”) that changes the user flow quite significantly. There it might make more sense to move the button to another position. The CSS for that is quite similar:
.user-feedback-button.user-feedback-button-init { right: auto; left: -3px; bottom: 60px; }