Need access to install illustrator 2019.

Need access to install illustrator 2019. The cloud is showing installer availability for illustrator 2020 ONLY. The 2020 version’s performance is not stable. Illustrator 2019 & 2018 were installed previously.  Those versions performed fine. I removed them, hence uninstalled 2019 & 2018 to update to the current 2020 version........ . . that was a mistake. Please advise.

Thank you,

Leonard