Hmmm that is really bad news for those who are using Engine Desktop as library management software ? 
An alternative is to move to Mixxx - Free DJ Mixing Software App Even if you would not use it as a performance software. It is it really good alternative … (runs on Windows / Linux and MacOS)
It has a rescan and relink feature as well …
And it can export to Engine DJ OS
This is not a publicity post !!! Just try to help where people are in trouble.
I do am a fan 
of ENGINE OS 