Have got around the AVG blocking by substituting the string in jnlp_embedded: with two variables, each containing part of the string, i.e.

AVGpart1="8am5scCB";
AVGpart2="ocmVmPS";

jnlp_embedded:"PD9....Pgo"+AVGpart1+AVGpart2+"JTd....

This should work for harvey186.

Sweet Home 3D is great program, by the way!