Try saving it as a generic item (the option is on the last tab)

I usually go and change the lighting parameters mostly, should be easy.

Some people recommended Neosis, but it hasn't been working great for me, so I don't know...anyone knows a better program?

Noesis is kinda useless to be honest...I tried converting some models to xnalara but it doesn't work...

Modify -> Save scene as .obj and save textures.

Go to Modify and select "Add" then select the bone you want to attach it to.

Is this xnalara? doesn't look anything like the one I'm using...

Good thing I don't use anti-virus, window defender is better.

Usually what I do is adjust the lighting angle and it's all fixed for me.

Maybe there are programs to do that...like Blender?