So ... got bold with trying to get this cpg back online.
since upgrading seemed to be option, i thought why not run "upgrade" on current version 1.5.34?
in browser went to cpg folder & replaced index.php with install.php. mssg return that install had been run & locked. to run again, need to delete a file.
using ftp app, deleted specified file, then went back to cpg folder & ran install.php.
using classic cpg installation, filled in textboxes, then clicked Next, or whatever, and mssg returned [see attached]. this is only topof mssg dialog, install portion not shown for security purposes.
original install had table prefix cpg_
to avoid creating another cpg install, used same prefix cpg_ & error mssg appeared.
now browser cpg link takes to installation routine.