Your tb licence is text file in internal sd named titaniumbackup_licence.txt
just copy it and keep it safe
you can just redownload the free version next time and it will auto be pro version once it detect the licence txt file

Why don't you just redownload the license from market? It is stuck forever on your gmail account no matter what rom or android device you use.

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Added on September 21, 2011, 12:21 pm

vr and batista and cog rom.among these three.which would you all choose?im just want to know which you all will choose.so that i may go with the flow or try some new rom,

There is no such thing as the best. Every one has their pro and con. I can give you you easily 3 pros and cons each ROMs has but I am just lazy. Self preference. Go with the one you liked the most. 

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Added on September 21, 2011, 5:15 pm
Personally, I love all three. I wouldn't say which is betetr as each has their pros and cons.

VR - super stable among all
Batista - updates quite frequently and most updates are good
Cog - simplicity at times, rules.

If I have to choose, VR will be the one but just that VR seldom update itself as it is already great honestly. IMO, VR = Batista > Cog.

im not into those tweaking   
just wanna try roms that can gimme fresh experience.

how about Dark Knight ?
tempting ehh , came with many theme too 

how about battery life ?

does it support siyah kernel ?

thx

villainrom = stock rom.

cognition = got modded apps like camera, battery mod, etc.