Well, that sorta thing can happen.
Shareware trials often come with "bundled apps" that keep track of the 30 days.
Kinda a price you pay to try 'em.
The full Nero Suite is quite complete in it's offering(s)
A very good program, really, but ... well, with most any program like it, they'll do this:
Change registry keys.
Ask you about file associations (which to open with what?)
Ask about being the "default" this or that.
Start menu entry?
Short cut on desktop?
Default folders set up, etc.
So, when you uninstall it (any of them) it is best to
follow the tracks, and see what happened while they were on your PC
That means, check your C:\Program Files for any left overs.
If found, delete them.
If you run into trouble doing that, do it in safe mode.
About the time you start uninstalling programs and they leave traces
is about the time you (at least I did) might want to check out Utilities.
Utilities are small specific programs (or applications) that do things for you.
One I use is this:http://www.topqualityfreeware.com/lost1.html
That is the last of the free versions, I think.
With it you can explore your system and determine what is still there,
in the registry & in the files that perhaps were missed.
You can use it CAREFULLY, paying attention to read the helps and
make & understand that backups should be made, then proceed to learn
what I can't really fully explain in one post.
Google search this for more information, too.
jv16 Power Tools v 126.96.36.199