1. It could still be in your download folder. Backup the database first! The database may not necessarily work without hickup on a previous version. You'd probably have to at least tweak the version number in the database. If you don't know how to do it, first find out if it is needed at all, then get back here.
2. I stored some older install files here: https://u.pcloud.link/publink/show?code=kZt4J1VZRtpIHIU9CzyJ2A1vCUmbnY4D15jX You didn't specify the OS, but they should be there.
3. Why do you say you can't use the new version? At some point you won't be able to stick with 2022.1, even though it may last you a long time...