Did you just find a file that has a digital signature from WebToGo GmbH? If that's the case, please read on.
You will probably see WebToGo GmbH when clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view additional details from the WebToGo GmbH certificate with the following steps:
Here is a screenshot of a file that has been signed by WebToGo GmbH:

As you can see in the screencap above, Windows states that "This digital signature is OK". This implies that the file has been published by WebToGo GmbH and that the file has not been tampered with.
If you click the View Certificate button shown in the screencap above, you can view 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 view the address for WebToGo GmbH, such as the street name, city and country.
Thawte Code Signing CA - G2 and thawte SHA256 Code Signing CA has issued the WebToGo GmbH certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screengrab above.
These are the WebToGo GmbH files I have gathered, thanks to the FreeFixer users.
The detection percentage is based on the fact that I have gathered 474 scan results for the WebToGo GmbH files. 0 of these scan results came up with some sort of detection. You can view the full details of the scan reports by examining the files listed above.
The analysis is done on certificates with the following serial numbers: