questions about your themes and wordpress administration

I bought your theme for an urgent development Im making for a client. I was working on my own hosting but now they want me to migrate to THEIR hosting. So Im unconfortable with they knowing I'm working on a Theme by a third party. Is there any way I can somehow "disguise" the Upfront Plugin and Fixer Theme names and logo in the wordpress backend administration, in case they get to see the enviroment Im working on? Whats your advice on this since you may have many people using your products for their own clients?
Thank you