Hi Franco,
If you want to use beta versions you need to read this thread:
https://www.swisslogforwindows.com/forum...hp?tid=812
However the source of your issue has nothing to do with Swisslog but you are not using latest TQSL software. It's
VERY IMPORTANT to update TQSL before using the Swisslog's LoTW synch! Open TQSL then go to
Help > Check updates. Current TQSL version is 2.6.5. If you are using a very old version you won't be able to update TQSL from this option. You will have to download and install TQSL manually. You can download latest TQSL version from the Download section of the Swisslog website. Once you have installed latest version, run it and maybe it will prompt you to update latest configuration file. Afterwards perform again the LOTW synch and all will work as expected.
Best 73