Hey Joydip - did you find out an answer for this question or what worked for you? The current documentation is not very helpful for upgrading server to a non-default location. I am in a similar situation where our server installation is in E:\Tableau\Tableau Server and it has a 10.1 folder. I am upgrading from 10.1 to 10.4. Any lessons learned or what worked for you would help.Thank you very much in advance.
I also faced the same issue and ended up installing a newer one rather than upgrading.
My original Location - E:\Tableau Server\10.1
The resolution should be -
Just browse to "E" drive.....Tableau automatically appends "Tableau Server" to the path browsed by you and creates a <version number> folder in it.
So to summarize -
Original Location - E:\Tableau Server\10.1
Browse to - E
Tableau automatically appends - Tableau Server
After successful up gradation - E:\Tableau Server\<version number>
This makes sure we don't install a brand new server and just upgrade the existing one.