Can I safely delete certain files?

Question

I do a full backup of my Quicken files using the date option.  Then, to save disk space, I delete the older Quicken .QDF files I no longer want.
      However, I have a lot of other, and older, Quicken files on my computer that I want to know if I can delete.  The file extensions are:  .EML, .QEL,  .IDX,  .QPH,  .NPC,  .ABD,  .QMD, and .QTX.
      Can these files be deleted, and if so, what limits should I follow?
      Thanks for your help!

Dudley · Answer

Thanks for your help and advice!  I'll give it a shot, and hopefully not get shot!!!!  (Sorry!)  I found out on the web that the .EML file has to do with email, but I won't be deleting it.  Thanks again for your help!!!!

splasher · Answer

Based on R46.12, you are running subscription Quicken, the current general release version of Quicken.  The data file has a .QDF file extension and the backups will have a .QDF-backup extension.
Files with ".QEL, .IDX, .QPH, and .QMD" extensions are from before Quicken 2010 when Quicken moved to a unified single file data file.  You can make a copy of them if you want before you delete them but they are old and no longer needed.
.ABD is the Address Book, so don't delete it/them.
.QTX, .EML, NPC - I don't know what they are used by, so I can't advise you on them.

Dudley · Answer

Previously I looked all over to find my Quicken version and could not find it, but you solved the mystery!  Thanks!  Here's the info:  Quicken Home, Business & Rental Property;  Version R46.12;  Build 27.1.46.12;  Windows 11 Enterprise.  Hope this answers your question!