Please note that the following 2 files are sensitive to the configure/update process and we strongly advise you to avoid the manual modification, because they are overwritten during this time, and all manual modifications will be lost:

Sentinel/conf/licence

Sentinel/conf/trkserver.xml

Instead, all changes should be made in the installation screens, while running the configure script located in the main installation folder. This way the changes will be permanent. In case you cannot perform a configure operation immediately, take a backup of these files and make sure to place them back after the configure/update process.