I want to change male accessory to female but I can't do it with simpe. someone help

If it's a hand accessory it could work to do a simple gender conversion in the file. It depends on the hands, but probably will look okay.

You can try going to the "MeshOverlay" resource and change the "Gender" line to "3". Then click "Commit" and save the file. Check ingame if it looks fine. You may have to delete cache files if there are any problems with the file ingame.

If that doesn't look good for both genders, you'll have to do a mesh conversion, which is a lot more work.

It works, thank you soo much!!

Keep in mind, this doesn't work for all kinds of accessories. Hand accessories work fine, but anything for the head or tight to the body elsewhere often needs a new mesh.

Also forgot to say, if you need the same accessory for YA and elder, you can change the "age" category to 58 (which is 40 for YA, 10 for elder, 8 for adult, combined).