Hi there!
I currently have two oldies with CRF and sadly lost one last year.
As Gillian says, the most important thing is that your cat eats
something. Yes, the best food for her is a complete renal prescription diet (wet), but as you have discovered, not all cats adjust to this.
I would suggest you take Beauty to the vets early next week - they might wish to repeat the blood tests to check her toxin levels, or they might just simply give her an injection to stimulate her appetite. My Martha had a series of these last year shortly after she was diagnosed and it encouraged her to eat the new food (I never thought I'd get her off Sheba!!).
On the other hand, MeToo, who I adopted 3 weeks ago, refuses to touch any of the renal wet food, despite the appetite stimulant. My vet says the most important thing at the moment though is just to get him to eat (he is only 3kg) and 'prescribed' cooked chicken breast & pilchards in tomato sauce - the latter which I warm in the microwave for a few secs. However, if we can't encourage him to convert over the next month or so, then we'll have to think about adding a phosphorous binder to his food - or at least find a normal brand that he will eat, which doesn't have too high a phosphorous content.
So, I would let Beauty eat whatever she enjoys this weekend... just do take care over the renal dry, as this can contribute to dehydration/constipation issues - MeToo loves these of course, but I'm having to limit them as he's been getting a bit bunged up!
Good luck and let us know what you decide/how you get on.