New and Reset will not adversely affect your files.
All settings will remain as you have them including attributes.
It's always a good idea to have back Work Environment(s) on your server so you can import them into other files on any computer.
Options> Work Environment
You can select one or more of the subset areas to export/import, or select a Work Environment which will include all. Once selected you will have the option to export it.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"