By default, QuickBooks shows the most recent 2 company files you’ve opened in QuickBooks, but this number can be easily changed. The program can display up to 20 companies.
The most direct way to change it is to first open a company file, and then click on the Set number of previous companies… on the File->Open Previous Company menu. That menu is shown below.
Enter the number of companies you’d like to display (from 1 to 20) and click Ok.
This setting is stored in the QBWUSER.INI file, which you can locate and edit using the Tech Help window.
The setting is recorded as:
Sometimes, in multi-user configurations, efforts to save the file might be unsuccessful and may or may not be accompanied by an error message. If you can’t save the file, check your folder permissions on the folder where the QBWUSER.INI file is located.