I dabble in technology but I am not very good at it. I want to learn but when I try to learn a new tool I generally end up on pages like this (Python) - http://www.python.org/download/ - and I have no idea which version I should be using. I realized this when I was on the Notepad ++ site today - http://notepad-plus-plus.org/download/v6.1.2.html - and it explicitly says, if you don't know, use this.
Not ripping on Python, I like it, but they should tell me what to use. Same thing with your products. Their is probably one tool or pricing plan that your users choose 90% of the time. Tell everyone to use it. If they have refined tastes, they will be able to find what they are looking for.
Lots of things still only target/support the 2.7 releases, and 3.x.x stuff is only slowing coming around.
I had read (via a link here on HN months ago) someone explaining that Python used to have a solid versioning strategy for these changes, but I'll have to leave it up to those more qualified to explain exactly what the issues behind 3.x.x adoption are.
It's definitely a pain, as I always want to install the newer version, but practically every library I want to use seems to target 2.7
Also, on that Python download page, they actually do tell you which one to use if you're not sure:
"If you don't know which version to use, start with Python 2.7; more existing third party software is compatible with Python 2 than Python 3 right now."
It's just above the download links.