2LE updates? (Satellite positions etc.)

[PE1PQX]

LS,

First I like to thank the developers for starting OpenHamClock with the future of HAMCLOCK being shut down due to the passing of Elwood, WB0OEW (RIP!)

After tinkering around with OpenHamClock on a raspberry I find it very usefull but I like to know how to update all the available 2LE (2-line elements, satellite data). According to OpenHamClock the ISS was over my head, but Orbitron showed a complete different position (Half a world away).
I know Orbitron has valid data, thus thinking OpenHamClock does not...

How to update the 2LE data-set??

Thanks anyway...