Try using dreamboxedit:
http://www.vuplus-community.net/board/threads/dreamboxedit.18975/page-2
If you haven't used it before, set up a folder, on your PC's desktop, and name it settings, default name, and location.
Start up dreamboxedit, go to tools, and click on options.
Enter you receivers IP address, test the connection, and if it works save it.
Now go to file and click on Fast FTP download, this will download your current satellite list, into dreamboxedit.
You can now delete the unwanted Bouquets, on the right, and edit your channel list.
If deleting a lot of channels change the All Satellites option, to a satellite you don't need, then select all those channels, by selecting the one at the top of the page, pressing both the Ctrl key, & the A key, to select All, then delete them.
Once you've finished you can FTP the amended list, back to your receiver, and save it, in the settings folder, for any time you might need it again.
Please post back, if you have any questions, and with the results.