Hi all!

Virus: sure, false positive, as with any other miner ever. There's no malicious behavior at all, it's a miner, it mines, period. Just be sure to download it from the github, otherwise the fake ones from Mega are trojan. I'm not related with them in any way, and they are online from almost the very first release of JCE in ~april 2018

Process control: you can pause all devices, and even close the miner itself remotely
Config edit: it's possible in an indirect way, with edition of file serviceconfig.txt (which may be a symlink to a remote file) and then restart. This way you can edit in any way: change pool, number of cpu, whatever.

@maedonald
there's a watchdog to close the miner in such case --watchdog N with N the minimum GPU hashrate (ignoring CPUs).
I didn't implement the restart because i experienced it to always fail with Claymore (the restart froze the miner or the whole PC).
But right, in next GPU version i'll add the option to make the watchdog restart instead of close, since it's a popular request.

Linux crashes: very interresting report. On a modern Ubuntu x64, the casual case. There may be a mem leak that doesn't show in the Windows version.
Did you use SSL? and/or Nicehash? The keepalive?
Those 3 params have an impact on the netcode. The main mining code is just a loop that hash and rehash on the same piece of ram, no allocation. But the netcode plays with the memory.