Re: How to move subscriber passwords with upgrade from 2.x to 4.
no, you'll have to manually recreate them (this is covered in the Full DB Import/Export help file). The passwords are stored in a one way hash (i.e. you can't unencrypt them, only check for a match). However the encryption format changed between 2.x and 3.x/4.x (i.e. it got stronger in 3.x) so you can't just carry it forward.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.