My suggestion: Do not accept shoddy service, go back to this person and express your dissatisfaction...if you paid for this "service."
If you didn't pay, then accept the consequences as a lesson in life and move on.
As for the Arcsoft program, you are right, it is no longer available. Older versions of software (especially graphics software are routinely replaced at download locations when a new demo or shareware version comes out. You either move on to another program, the latest version of Photo Impressions (6.5) or take it out on the person who eliminated your file copy.
I recently went through this when I was looking for an older version of Ulead PhotoImpact
...but I still have my older versions among my backups.