The elb files can be opened with the appropriate program.
If you try to open an Elb file and if it cannot be opened, then there can be various possible reasons for that. Such as the elb file is corrupt, appropriate program isn’t installed, or there is some registry related error.
In such case, some software is required to access the elb file data.
With online search, I have found one such software that I would like to recommend.
Check out the “Advanced File Optimizer” available at http://advancedfileoptimizer.com/file-extension/elb/