Is there a way or an option in File Roller to use a single window session.
The default is to open a separate window for each archive you open.
Is this possible, or are there alternative archive-managers with this capability?
It seems this isn't possible in File roller, but as an alternative (like you asked) you can use xarchiver .
To install it, click on this button:
It will not open a new window, rather it will open a new tab in the existing window. Here is a screenshot of the xarchiver: