Laser cutter printing everything mirrored/backwards

Currently using a LS6090 in a secondary school downloading files from RDworks as SVGs (DXFs just go all black on the laser cutter for some reason). Everything is cutting/engraving backwards/mirrored and we can't figure out why. A temporary solution has been to simply mirror designs within RDworks but something has gone wrong somewhere for this to be the case. On previews within RDworks designs appear the correct way round but when sent to the machine the appear mirrored on the machine's screen and this is what gets printed. 

 

I've tried playing with 'screen origin' and other axes settings to no avail. 

 

Many thanks in advance for any suggestions!