I have the feeling that on our PCs we are missing something...maybe some accessory software...
unfortunately I am quite ignorant...so can only have feelings!
With the latest LIME firmwares something in the FW/HW/protocol is changed., and if you open dvb-s gui the LIME will not be detected. You must copy the LimeSuite.dll from the LimeSuiteGui folder to the dvb-s gui in order to work.
The last version is LimeSuiteGUI_20190513_b534e74.exe (end of may) .
You can found here : https://downloads.myriadrf.org/builds/limesuite/
If you have installed LimeSuiteGUI on the C drive, you can found LimeSuite.dll here : C:\Program Files\PothosSDR\bin