Limiting Exchanges

If I want to limit the exchanges used, I believe I can delete them in Quotemanager. However if I want to restore some or all of them, how do I do it?
Can it be done by making copies of the quotemanager files, then deleting exchanges in quotemanager, and use the file copies to restore if necessary. Also, will an update undo all of this?

If I want to limit the exchanges used, I believe I can delete them in Quotemanager. However if I want to restore some or all of them, how do I do it?
Can it be done by making copies of the quotemanager files, then deleting exchanges in quotemanager, and use the file copies to restore if necessary. Also, will an update undo all of this?

Why do you want to delete the exchanges? They are not taking up any spaces.

To restore the settings, you can always re-install or repair MC.

I only need one exchange which is IA Broker SMART. If I want to have a large list in pre-scanning, I have to go through the list and adjust each instrument to the exchange I want. Perhaps you have a way to do this in a more practical way.