This is a known issue described by Microsoft, where files that solve it are also available for download.
To be sure, we also attach a help file. In some space-saving hotfixes, it was not included. Rename the file from .txt to .hlp.
Windows 10 does not support .hlp files. However, this feature can be bypassed. Please, use this link. We tried "Solution 2 - Install the winhlp32.exe" where it will replace the winhlp32.exe file in the Windows folder with an older file type. After that, you can help open other .hlp files in RcWare Vision.
Alternatively, the .hlp file in the RcWare/HELP folder can be converted to PDF. These are the solutions identified so far.