Orbitron is probably the most popular satellite tracking program for the PC.  It is free but has not been updated in years.  Even being so old it still runs flawlessly under Windows 11 today. 
There is a problem with the Keplerian element sets, (tracking elements), that it downloads if you are using it today or download from the source web site.  Celestrak has changed their format for the files and file names.  A friend and I got locked out of being able to pull update due to this fact.  My friend contacted the Celestrak administrator and after we updated our file URLs we were unblocked and all has been well ever since.  One change made a few years ago was moving from Celestrak.com to Celestrak.org.  Even through the .com files still appear to update they will eventually go a way. 

To update your URLs to pull tracking elements with Orbitron and continue to copy and paste the following list of URLs into your group editor for Celestrak.com - Common.  Be sure and delete the old URLs with .com before you do so they will not be used again.

I have added two at the bottom that I use as well.  I have been using the NASA Bare set for years and the CSN Bare is used if you have the S.A.T. interface by CSN Technologies.  This set will have a lot of the newer Russian UHF SSTV satellite in my SSTV/Digital list.

For all the details see this web page: https://usradioguy.com/using-new-tle-format/

If anyone uses GoSatWatch on IOS this also effects that application as well.
Any application that uses the old Celestrak.com URLs needs to be updated.