Hi, I'm Robert and I'll be helping you with your financial software question.
find the quicken data file that you want to open from windows rather than quicken. They are usually in the quicken folder under my documents but you can search for *.qdf or whatever name you gave the file
when you find it
copy it to a new folder
preferably my documents or my pictures something that you have full access rights to
on this new copy
right click on it and select rename
give it a new name while leaving the qdf after the period the same
right click on it and select properties
make sure nothing is checked for hidden or read only or system
Then start the quicken by holding the ctrl key down while double clicking on the quicken icon
that will start it in safe mode with no data file
hit file / open
browse to the new file that you created and open that.