Trackir Pro with 6 deg of motion expansion question

I have the Trackir Pro ser #XXXXX. Win 7x64 OS. I use FSX exclusively. I have Ver 4.1 build 28 installed. It worked great, but now I need to uncheck the true view box and I cannot get to the setup screen. I am happy with my profile, but to use with EZdok I have to make some changes. I am afraid of screwing something up by going to the updated version. How do I install the newest version TrackIR_4.2.0.39? Will I have to redo my profile? Do I have to uninstall it from the control panel uninstall/change page before I install the new version? I have searched the forum but was not able to find the answer to my question. I have read the manuel numerous times. Thank you for your help.

Lynn