With VeSys there is no need to remove the old version, the software on install detects the older version and will not install/update any of the configuration files. After you have installed and open either the database or the drawing the schema (or format) of the data will be transparently updated i.e. you will not see it do it or have to do anything.
An important point to make though is that although this schema change is transparent if you save the drawing it will automatically be in the new format and so it will not be possible for users with the older versions to edit these drawings or database - ther drawings will still be viewable.
Very good advice ... Thank You Very Much,