To upgrade Freeware version to Plus version for 98/Me/95, follow these steps:

1. Run mail server application;
2. Click File - Stop;
3. Run Control Panel, and double click select Add or Remove Programs;
4. Select ArGoSoft Mail Server Freeware, and click Change/Remove;
5. Uncheck Remove Data Files, Remove Registry Data options. Again, these options must be unchecked.
6. Click Next;
7. Click Remove Now;
8. If prompted, Restart your computer;
9. Execute Mail Server Plus setup, make sure to install it in the same directory, where you kept Plus (default);