Hello @M. M. Rohana Wasantha ,
Thank you for reaching out. To better assist you, I have personally tested the Jagannatha Hora 8.0 software on my end, and I experienced the exact same issue you described.
Upon checking the installation folder, I noticed that the software relies on a legacy Windows Help file named jhora.hlp. It seems that this older format is now completely out of support on modern Windows systems (like Windows 10 and 11). In fact, when clicking on "Contents" or any other tab in the Help menu, the system automatically redirects to this Microsoft webpage: https://www.microsoft.com/en-GB/windows/end-of-support.
Since Windows can no longer open this file type directly, below are a couple of suggestions you could try to access the manual:
1. Convert the file to PDF
You can navigate to the software's folder (usually located at C:\Program Files (x86)\Jagannatha Hora\bin), find the jhora.hlp file, and upload it to a free online converter tool (by searching "convert HLP to PDF" on Google). This will allow you to read the manual using any standard PDF viewer.
2. Check for an official PDF alternative You might also want to visit the developer's official website or forums to see if they offer a downloadable PDF version of the documentation for users on newer Windows operating systems.
I hope this clarifies why the issue is occurring and helps you access the manual. If you found my response helpful or informative, I would greatly appreciate it if you could follow this guide for your confirmation.
Thank you.