From 2020 SP1 to 2019 SP3

Dear all,

where can I find the installation file of the 2019 SP3 version?
With the 2020 version I have a lot of problems, many files cannot be opened anymore and Draftsight gives me various errors. I also have a problem with the mouse wheel getting stuck often on "pan".

On the download page if I select the 2019 SP3 version, I still download the 2020 SP1.

Thanks in advance
Manuel