Currently the latest version of the editor from [7f664c] is improperly collecting images when run from the latest JRE version. From what I gather there has been a change in method inheritance so now java.nio.ByteBuffer no longer has clear() or flip().
This causes issues in FaceObjectsCollectable.java lines 119 and 121. It can be worked around by casting it to a java.nio.Buffer for those two calls.
Fixed in 8a38f7c3c84423ebabac29378932b2316521b31d with the suggested fix.