Hello everyone. When the FSLTL support for FSHud expired, I only used version 1.6.6, which was the last version with native support for FSHud. That worked very well for a long time. With the new FSHud (2.0.309), you have to say goodbye to FSLTL 1.6.6 and install the current FSLTL version via FBW Installer and start it after loading MSFS. If the settings in MSFS and FSHud are set as described in the respective descriptions, everything will work as before.
Many thanks to Paul for the suggestion to use the ticket system in the FSHud interface, and a big thank you to FSHud Support for the very quick response.