Latest questions about "download software"

Just tried to download the free version of Speed Checker. Paid for it on my Android, but my antivirus program will not allow me to go to the download site.

I bought the book that came with a CD. I installed it on my computer and I worked with it for a while and it worked perfect. Today I tried to open it and the folder is empty, and can't find the CD.

I have downloaded the program and I really like it, but I honestly don't want to send for it. I was just wondering how do you digitally download your software?