Should I still file as Divorced vs Single if I've been divorced for 7 years?

Divorced is a marital status, not a filing status. When TurboTax asks about your marital status, you should continue to select divorced unless you have remarried. TurboTax will ask some other questions to determine your filing status. Your filing status will probably be single, unless you have a child or other dependent living in your home.

Selecting divorced instead of single as your marital status probably won't make any difference in your tax return, but you should select it just to make sure, for the sake of accuracy.

Divorced is not a filing status on a tax return.  You file as Single.  The software might ask some questions about being divorced in order to lead to questions about alimony.   Look at the top of a Form 1040.  Divorced is not there as a choice.

PREVIEW 1040

https://ttlc.intuit.com/questions/1901539-how-do-i-preview-my-turbotax-online-return-before-filing

Click on Tax Tools on the left side of the screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.