Heightmap Surface [plug-in] (updated: 2014/Jun/30)

[steelsnake]

On Wings 1.5.3 I do get an error after installing the plugin:

Code:

wpc_heightmap_surface:command/3: bad return value: {'EXIT',
                                                    {{badmatch,{error,enoent}},
                                                     [{wp9_dialogs,file_list,
                                                       3,
                                                       [{file,
                                                         "wp9_dialogs.erl"},
                                                        {line,284}]},
                                                      {wp9_dialogs,dialog_1,
                                                       5,
                                                       [{file,
                                                         "wp9_dialogs.erl"},
                                                        {line,82}]},
                                                      {wp9_dialogs,dialog,4,
                                                       [{file,
                                                         "wp9_dialogs.erl"},
                                                        {line,72}]},
                                                      {wings_develop,
                                                       time_command,2,
                                                       [{file,
                                                         "wings_develop.erl"},
                                                        {line,81}]},
                                                      {wings_plugin,command,
                                                       3,
                                                       [{file,
                                                         "wings_plugin.erl"},
                                                        {line,127}]},
                                                      {wings,raw_command_1,3,
                                                       [{file,"wings.erl"},
                                                        {line,592}]},
                                                      {wings,raw_command,4,
                                                       [{file,"wings.erl"},
                                                        {line,589}]},
                                                      {wings_wm,handle_event,
                                                       3,
                                                       [{file,[...]},
                                                        {line,...}]}]}}

This is with the heightmap_surface-erts.5.10.vFinal.zip ZIP from the first post. I know it worked in 1.5.1 but I haven't used it since... any idea what's wrong?