@floatingstones When you install 2021R1 you will have access to 2021R1 until 03/31/22. Currently the installation of 2021R1 does not renew access to prior releases.
2021R1 license will expire in March 2022 as mentioned on the download page. Once the license expires, you need to revisit the download page and download a fresh copy of the 2021R1 having 6-month of extended license (March 2022 to September 2022). Product license will be deactivated and can't be renewed beyond September 2022.
Ansys customers with active commercial software licenses can access the customer portal and submit support questions. You will need your active account number to register.