How to downgrade IntelliJ to older version

My operating System is Ubuntu 18.04 I downgraded my Idea community edition version 2020.3 to 2020.2 because it was causing so much lombok issues by using the following steps:
Step 1 : open ubuntu software search idea community click on channel version select version you wish to install and it will downgrade your version with all settings restored. if you dont want previous settings then just clean uninstall idea

Download and install the old version from this page.

Another option is to use the JetBrains Toolbox App. It allows to install multiple IDE versions, perform rollbacks if needed, applies updates to the IDE and plug-ins, etc.

simplest way for Mac users with TimeMachine:

1 open TimeMachine

2 select time before Idea upgrade

3 navigate to Applications

4 select IntelliJ Idea app

5 [Restore] -> [Replace]

I have successfuly restored Idea this way because of plugins compartibility.