How can I use the free file edition instead of paid programs I used in previous years?

You can try to clear and start over https://ttlc.intuit.com/replies/4248526 

Or 

There is also The Turbo Tax Free File program which is free for federal and state.  And has more forms than the Federal Free Edition, like Schedules A, B, C , D, E, F, EIC, H, K-1, SE,  etc.

NOTE:  You will have to log out of your regular Turbo Tax Account and setup a new account with a new username and new password or it will take you back to regular Turbo Tax.

To qualify for the Free File website  you just need to meet one of these 3 things

AGI $34,000 or less

Active duty military with AGI of $66,000 or less

OR qualify for EIC (earned income credit.)

In order to use the Free File program, you have to start it at a special website.  Click on the bottom Orange button I Qualify Start Now and set up a NEW account

http://turbotax.intuit.com/taxfreedom/

But if you had to use a paid version before you may not qualify for the Online Free Edition or Free File website.