Use of eremove is fairly simple, and mostly self explanatory.
Run the program, and you get the following screen :
Simply enter your details and click Connect. Once the headers for the emails have been downloaded, you will get a screen similar to the following :
You can select whichever messages you wish to delete here, either individually, or using the "select all" button.
You can also preview the headers and contents of individual emails by double-clicking them.
Clicking Delete will permanently delete the selected mails from the server, there is no UNDO for this.
And that's it. Enjoy