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....
Solution 1: Follow these instructions if you are trying to open your data file in your current version of Quicken. (If you are attempting to open your data file in an earlier version of Quicken, see solution 2, below.). 1  Verify that you have removed all earlier versions of Quicken from the computer.2  This will prevent accidentally opening (and possibly damaging) your Quicken data files in the future: Uninstall the current (newer) Quicken program. 2  To uninstall: 3  Point to Settings on the Start menu, and choose Control Panel. 4  This opens the Control Panel window. 5  In the Control Panel window, double-click the Add/Remove Programs icon.