In order to repair damage to one of the two paired molecules of DNA, there exist a number of excision repair mechanisms that remove the damaged nucleotide and replace it with an undamaged nucleotide complementary to that found in the undamaged DNA strand.
Depending on the type of Quicken program used and the document(s) created, Quicken files can have one of several different extension types. The most common Quicken file extensions are the following: .qdf, .qsd, .qel, .qph.ata files in Quicken end with the file extension .QDF, and this is another way to search for your Quicken data files....
1 Go to the Quicken Update Index. 2  Click on your Quicken version, which is Quicken [year]. ( 3 Example: Quicken 2013). 4  Scroll down until you see the list of download files. 5  The file at the top of the list is the most recent release, and it will have R(x) in the file name with (x) representing the update release number.