Quicken too slow after years of data input

Hello @realdeal27, 

Thank you for reaching out to the Quicken Community. We apologize you are having this difficulty. For this particular instance, I would recommend creating a copy of the file with the desired dates. This can be done by selecting File >Copy or Backup File >Create a Copy or Template >Next. A visual example is below. 



On the next popup window, you may select the appropriate dates to include in your file. Once you have chosen the desired dates click Save Copy. Visual example is below. 



Once the file has been copied you will be prompted to choose the copy or original file; select the copy. The original file containing all the other data can be kept for reference. 

Hope this helps. Let us know if you have any other questions or concerns. 

-Quicken Paloma