You must have been required to upgrade at some point and the program would have told you why and you could have denied the upgrade.
However ... for future reference ... there is the IRS FREE FILE option ... there are 10 different companies which offer a free program on this site but you must link in thru the IRS and not directly at any of those companies directly... this year if you made $69K or less there was a program for you to use ... use the tool to narrow down which ones will work for you ...
https://www.irs.gov/filing/free-file-do-your-federal-taxes-for-free
