Jdownloader stuck after restart and myjdownloader says "no jdownloader found"

Hi, since a couple of months when I restart jdownloader with

• sudo service jdownloader stop
• sudo service jdownloader start

it get stuck. A new file is created "JDownloader.jar.backup.1" and no "JDownloader.jar" file is present.
"sudo service jdownloader status" says "Failed to start jdownloader" (obviously).

If I stop the service, rename the jar file and restart it starts properly but myjdownloader cannot find my instance despite of it's configured correctly (worked fine since a couple of months ago)

I already removed and installed again the plugin.

Thanks for the suggestion but I see 2 issues:

• I'm running OMV on a rpi2, so docker plugin isn't working (wasn't working the last time I tried it); I can "setup" docker manually but in this way I loose the webGui benefit;
• using docker I startup a whole system (image) for each service, works really fine if your business is to provide services that must be self contained but just for fun should be heavy.

But thanks for the suggestion, your idea is a perfect backup plan if I fail following the omv way