Just heads up that when I did the 1.5.0 upgrade yesterday, the extruder stopped working. Took me a while to figure it out. It turned out the GcodeLevelling plugin and 1.5.0 don't seem to get along well. You essentially lose all of your E commands in the Gcode along the pipeline and thus your printer extrudes nothing. The XYZ moves are fine as well as all other moves, just the extruder E moves get killed.
To resolve I simply disabled the GcodeLevlling plugin and presto, back to normal.