z3ta+ 1.5.3 FX x64 not loading?

I'm using latest 64bit version of z3ta+ (v1) and the fx version refuses to load on neither Studio One v2.0.4 nor Renoise 2.8 (both 64bit versions). Synth is working fine, only the fx version refuses to even show up (with Studio One showing messages that it cant load the plugin). Anyone else having this problem? Dunno if it's something on my system, or it's a plugin error and I should contact support?