Windows Vista Users -
You must use 'run as administrator' to start Poker Tracker (and ALL your poker software)
The only files you need to backup are the database files. These files have the extension ".MDB". DO NOT BACKUP PTREGV2.MDB though. If you haven't created additional databases, the only files you'll have are PTRACK.MDB and HHDB.MDB. Additional databases usually have the names PTRACK2.MDB, PTRACK3.MDB unless you have renamed them.
If you want to move Poker Tracker to a different PC, just backup the database files then run the install program - Download Section - on the new PC. Copy the database files over to the new PC and overwrite the files loaded during the install. You will need to send a message via the Support System to obtain a new product key.
If you have created any custom known hands filters, you will also want to backup/copy the files ptfilter.txt and pthands.txt. These files contain the custom filters so if you copy these you won't have to recreate them on the new pc.
All of these files should be in the c:\program files\poker tracker v2 folder if you have used the default settings.