On-line & Download?

In tax year 2020, 2019, & 2018 I used the on-line version. As I go to prepare my 2021 taxes, I ordered the download version. The DL version was not able to find the 2020 tax file on my computer.  I am not able to download the 2020 .TAX file. (not sure why)

 

When I log in online, it shows I have the 2021 Self-Employed version, and I started to prep using it.  When I bought the 2021 downloadable, does it automatically grant me access to the on-line version?  If I continue with the on-line version (and if it meets my needs) will I need to pay again for this 2021 online version? (I already paid TT/Intuit for the 2021 download version).