Did you just stumble upon a file that has been digitally signed by Xelex Digital, LLC? If so, please read on.
You will probably notice Xelex Digital, LLC when running the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the additional details from the Xelex Digital, LLC digital signature with the following procedure:
Here is a screenshot of a file that has been signed by Xelex Digital, LLC:

As you can see in the screengrab above, the Windows OS reports that "This digital signature is OK". This implies that the file has been published by Xelex Digital, LLC and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can see all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, and so on. You can also examine the address for Xelex Digital, LLC, such as the street name, city and country.
Thawte Code Signing CA - G2 has issued the Xelex Digital, LLC certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the Xelex Digital, LLC files I've gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the Xelex Digital, LLC files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by Xelex Digital, LLC.
| Detection Ratio | File Name |
|---|---|
| Not available | webchartmd.exe |
The analysis has been done on certificates with the following serial numbers: