Hi Allen,
It is always good to have the latest version of CCS5 as it may have some fixes and improvisation in the features.
The release notes of CCS will give elaborate information between versions. http://software-dl.ti.com/dsps/dsps_public_sw/sdo_ccstudio/CCSv5/CCS_5_5_0/exports/ReleaseNote.htm
Please have a look and revert if you have any further questions.
Regards,
Shankari
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