Hi. I am also having an issue with this. In my industry Estimates are not an option. Everyone deals in quotes.

I have changed the word Estimate to Quotation as suggested however this is not working. Instead of replacing the word it appends it. My Email subject now reads "Estimate - Quotation QU-XXXX". 

Surely this is a bug. Also, the file name still reads Estimate.

Any progress been made on this?

Thanks,