These are a few reasons you may want to rename the file. Follow this step by step “ How to rename a file ” process to rename your QuickBooks company file: 1  To rename your company file in QuickBooks, exit the program and make sure all other users in QuickBooks exit the program.2  Open your network drive, “My computer” or wherever your QuickBooks file is saved. Now simply enter the new name you are going to use. 2  Do not use special characters other than underscore or hyphen characters. 3  Rename each file or folder with the new name. 4  You might have a folder such as “Restored_Company Name_Files” or “Company Name_Images”.