QNX IDE installation is self contained, it does not require admin privileges to install and can co-exist with any number
 of other Momentics and IDE installations. So if you want to try new version you can do it just by downloading and 
unzipping ide archive in any folder. IDE tools settings are configured by setting environment variables. 

See installation instructions here: 
http://community.qnx.com/sf/wiki/do/viewPage/projects.ide/wiki/Builds_Tau_Integration

When you try new IDE, especially development build, make sure to use new workspace. If you want to use your primary 
workspace make sure you back it up because there is no guarantee that it would work with previous versions of IDE (it 
may upconvert it).

Don't forget to post any trial problems on IDE General forum.