I bought the lm package of the net which included I quote[pro version update-movie codek packfor a total of 14.95$].I down loaded it from the email and have the file on my desktop.[mac osx.10.3.9.] propackcodec 203b.exe.How do I install it.If I single click,nothing.If I double click I get a window saying resourse mismatch.HELP PLEASE.