Vlad Drumea wants to keep some connections:
In this post I demo a PowerShell script that can be used to extract and decrypt SSMS 21 and 22 saved connection information.
This script builds on the one for importing saved connections from SSMS 21 to SSMS 22.
Instead of importing, it looks for any SSMS 21 and 22 related config folders, extracts the relevant connection data, decrypts it and saves it in clear text.
Click through for a link to the script, as well as an explanation of what is happening.