The latest update for Pathloss 5.1 can be downloaded using this link https://pathloss.net/p51update.exe
Pathloss 5.1 - Revision history
In order to update Pathloss 5.0 to Pathloss 5.1 you will need to perform the following steps:
The setup file can be downloaded by using the download link in your license email or by going to https://pathloss.net/download.html
Complete release notes are available at https://pathloss.com/p51/p51_release_notes.pdf