Appointment+ choose services dropdown to radio buttons

Hello,

We would like to make some modification to the way you choose the services in the appointment+. The same question has been asked here:
https://premium.wpmudev.org/forums/topic/radio-buttons-instead-of-dropdown-menu-in-appointments

However, this does not seem to be the case for the current version. I can see that the bellow is the code that generates the dropdown:

<div class="app_services_dropdown_select">
					<select id="app_select_services" name="app_select_services" class="app_select_services">
						<?php foreach ( $services as $service ): ?>
							<option value="<?php echo $service->ID; ?>" <?php selected( $service->ID, $selected_service ); ?>><?php echo stripslashes( $service->name ); ?></option>
						<?php endforeach; ?>
					</select>
					<input type="button" class="app_services_button" value="<?php echo esc_attr( $args['show'] ); ?>">
				</div>

Can someone help us change this from dropdown to radio buttons?