Not everyone wants to use the default terminology in UpStream.
For example, some people might want to use “Change Request” rather than the default “Bug”. Or perhaps they prefer “Customers” to “Clients”.
All of this text is customizable.
Go to the “UpStream” link in the WordPress admin, and click “General Settings”.
On the “General” screen you will be able to change the singular and plural labels for Project, Client, Milestone, Task, Bug and File.