This is what they look like right now. The first one is wrong because the sword should be on the right hand. The 2nd one is scaled negative with flip v on, its correct but the flip v wasnt needed. The 3rd one with the scaled negative only is actually correct.
I filed it and they added a option to import with option to flip xyz
https://github.com/Scirra/Construct-bugs/issues/9028 Here is test with the model
https://www.mediafire.com/file/me7b1o8k0yhmu5w/TESTTESTTEST.zip/file
