dbQwikSite is distributed with a setup program. Copying the dbQwikSite executable file will not work as a means to install the program.
To install dbQwikSite:
You can safely delete the install download after you have installed dbQwikSite.
When you purchase Paid Editions you will need to install the full version.
It can be downloaded from the link provided in the order confirmation e-mail, then run the install program.