I tried installing 6.20.1 without uninstalling my 6.15.4. On the install I used the Detailed version, which I have seldom used, just because it seemed safer.
The install did recognize that I had the earlier version and offered to back it up to veditold. I think I said OK, but after the install, I do not find that directory on my system. However, the earlier version remains in c:\vedit and has a separate entry on the Start>Programs list, so that is good.
(for the new version, I took the default C:\Program Files... installation dir.)
One problem I did have - it offered to move my config and keyboard option files, and presented me with the directory to copy them from, but this was wrong, and probably not just for my system. The directory it gave me was the ROOT. For example, it said it would copy my config file from:
instead of c:\vedit\vedit.cfg
I typed in the extra vedit subdir and it worked and transferred OK.
When I start the new vedit my config settings and keyboard are now correct (i.e. the files were transferred OK once I fixed the directory in those dialogs).
New Help works fine!
My initial startup stuff, where I set a different default directory for opens, load a user tools file, etc, do not work, but I can fiddle with that and get it working, I think.
Very nice!! :)