The version of Resilio Sync supplied by Drobo is not current. Instead, I'm running the current one from the Resilio web site. The Drobo keeps wanting to update it. I let it do so once, to see what happened: it back-levelled it. I'd like to prevent the Drobo checking that one app, but all I can see is a way to stop it checking all of them, and that doesn't actually stop it saying there's a new version!
Drobo's support pages barely work and their own support seem pretty clueless, so I'm hoping someone here will have an answer to this. If not, sorry for wasting your time.