Currently when you install Creo the icons for all versions are identical (so the Creo 5 icon is the same as Creo 6 etc). If you have multiple versions installed this can - and does - lead to simple errors opening the wrong version and occasionally results in files being updated to the new version.
A very simple solution - which SolidWorks and other CAD vendors use - is to add the version text to the Icon. So rather than just a simple box with a blue box, have a box with 6 in it, or 5 -you get the idea. Maybe even change the colours as well? Or just change the icons between versions. Anything is better than the current confusion.
The problem is illustrated below showing a screenshot from my taskbar - Creo 5, Creo 6, draftsight 2018, SolidWorks 2018, SolidWorks 2019.
Those of us that use multiple versions would find this extremely helpful - and it is a very simple change to implement.