LuxCoreRender not available

[Burk]

Sometimes I loose the LuxCoreRender. It's not in the list of the renderers in the info-panel even so it's activated in user preferences, see screen shot:

After remove and install from file in the user preferences LuxCoreRender is again in the list of renderer and I can use it.

What can I do to fix that.

I work with win 10, Blender 2.79b, LuxcoreRender 2.0

[Dade]

There must be a console error at the startup when Lux is not in the list, you should post the error message.