Reinstall Cubase 7.0

After the Mavericks update, CuBase 7.0 on my iMac 27, 8 gb ram, terabyte drive, has been starting tracks for playback during recording, also the software is unable to properly select inputs and outputs for some channels, and is stopping a recording session where my ram and disc drive have had plenty of space in the past.

I would like to see if reinstalling would fix these problems but I don’t know how or where to do this. I have all the proper credentials like activation code and up to date eLicensor.

Thanks in advance.