My problem is the same that this one: https://dba.stackexchange.com/questions/253777/is-it-possible-to-run-multiple-versions-of-mysql-workbench
I need to use mysql workbench 8 for mysql server version 8.0.27 and mysql workbench 6 for a version 5 mysql server.
The problem is that when installing workbench 8 it deletes existing workbench with lower version. I've tried to install Workbench6 on a completely different location to see if the installation does not find it but I it finds it anyway.
Also tried to install a 32 bit version of workbench 6 but again, version 8 delete it when installing.
Found some comments saying to enable multiple instances in menu -> edit -> preferences -> others, but this is only to open multiple instances of the same version.
I've looked for a portable version of workbench 6 but had no luck. I don't understand why this problem is not having an answer by MySQL, even the MySQL forum doesnt have a solution or even an explanation why this is not possible.