Copy file version.dll from  corresponding folder to folder from PRTG Server.exe necessary revision
x86: C:\Program Files (x86)\PRTG Network Monitor\
x64: C:\Program Files (x86)\PRTG Network Monitor\64 bit\

NOT BOTH FILES! And only one for the edition you want to use !!!

You have to disable auto updates
To switch editions use the x86.reg and x64.reg files, respectively.

add to the hosts file:
0.0.0.0 activation.paessler.com
0.0.0.0 activation.paessler.ag
0.0.0.0 activation.paessler.eu
0.0.0.0 activation1.paessler.com
0.0.0.0 activation1.paessler.ag
0.0.0.0 activation1.paessler.eu
0.0.0.0 autoupdate.paessler.com
0.0.0.0 autoupdate.paessler.ag
0.0.0.0 autoupdate.paessler.eu
0.0.0.0 updatecheck.paessler.com
0.0.0.0 updatecheck.paessler.ag
0.0.0.0 updatecheck.paessler.eu
0.0.0.0 api.prtgcloud.com
0.0.0.0 api.prtgcloud.ag
0.0.0.0 api.prtgcloud.eu
0.0.0.0 prtgicons.paessler.com
0.0.0.0 prtgicons.paessler.ag
0.0.0.0 prtgicons.paessler.eu

In the license.reg file, you can write down any of your data (for display in the web interface) and import it into the registry.
If there is an original activation.dat file in the program folder (created when Trial is activated), prtg will write the license status from there, or "Verify error".
It can be deleted, and after restarting the service, the status will become "Not activated", but it does not mean anything, the program is actually activated, and this inscription can be changed in the appropriate language files from the \ language \ folder whatever you like.


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