To be honest I'm not 100% sure what you mean.
If you're trying to set up a renaming configuration and save it you do so by setting all the rename options you want to use then go "File/Save As", you will save the settings as a .bru file, you reuse a favourite (saved configuration) by clicking "File/Open" and choose the .bru file you want to use.
Having said that, I've found the quickest way to open a favourite is by going "File/Recent", but that may depend on how many favourites you've saved, I'm not sure how many favourites are stored in "File/Recent".
Be aware that if you close BRU with a favourite open the next time you open BRU the favourite will also open, the way I've found to avoid this is by before closing BRU go "File/New" or hit Ctrl+N.
Sorry if I've misunderstood and this is not what you're trying to do
