There is a small problem/mix-up on the rooco page: the deb package (version 5.4.51) file (955 bytes, should be around 150K) is the same as the checksum file (955 bytes) except for the name . . .
Also strange, working on the RPi4, I could not download the files with Chrome but could download them with Firefox
Also strange, working on the RPi4, I could not download the files with Chrome but could download them with Firefox