It is possible to customize the UserPro templates by overriding them in your theme without touching the core files.
The steps are as follows :
- Create a folder named userpro in your themes folder. Should be -> theme/userpro
- Then copy the template you want to change inside your theme/userpro folder. Example : theme/userpro/view.php
- Modify the template in this folder as per your needs and apply the changes
This way you AVOID editing CSS/templates in CORE plugin and keep updates without an issue.
For more tutorials on Customizing your UserPro CSS follow this link: http://userproplugin.com/userpro/customize-your-userpro-css/