Bhavyashankar
Please see our upgrade documentation:
Upgrade Product Components - CA Test Data Manager - 4.5 - CA Technologies Documentation
Feel free to contact support at any time with upgrade issues (if any - as our upgrades are generally straight forward):
Contact CA Support - CA Technologies
You're also in very good hands with Manju narma13 (e-mail address typos notwithstanding ) - he knows how to get to support as well if the extra assist is needed.
Supporting the upgrade via the communities might not be ideal so a proper support case would be the best way to go if necessary.