Hi Larry ,
In any file format conversion , there are only two possibilities :
1. The file has just text characters
2. The file has a mix of text and special characters
If it is the former , then you can easily use Excel to open it.
If it is the latter , then the format has to be a documented one , where the format is available so that software can be written to do the conversion.
If the format is a proprietary one , and no documentation is available , then it is very unlikely that anyone would have taken the trouble to develop the conversion software.
If you have already downloaded the file , try using any binary file viewer , such as the following :
http://binary-viewer.en.softonic.com/
and see if you can view any text characters. If it is entirely text , then opening it in Excel should be easy. If not , then it will need to be converted using , probably VBA. But even this is possible only if there is some standard format ; since you know what it is supposed to contain , it would help if you could first do some work , and then let us know your findings.
Narayan