Thank you so much for the reply. Actually, you don't have to be online when you uninstall and install the program. I had downloaded it to my hard drive in a folder first and then when I chose to run the install, it automatically pops up a window saying the old version must be uninstalled first and asks if you want to do so now. That is when I encountered the problem, after I clicked on the uninstall option.
Actually, I had paused everything listed when I right-clicked on the Avast icon, but it still happened, so it may not have anything to do with my problem. I don't know.
This is a reputable company, Embird Embroidery Software and there are many, many users of this software. I posted a question on the Martha Pullen Machine Embroidery forum as well to see if anyone has encountered this problem. I may need to e-mail the Embird folks. You can tell, I'm not very computer literate and I apologize to those of you who are. But, I still enjoy what I do and can't move forward with it until I get past this hurdle. Thanks for the input.