Is there another way to retract fillets? I've tried the ctrl, shift, and both at once. None of those key selections did nothing with my 3D drawing. Is there something I could do in my settings to adjust this?
Attach your file here.
There is another (trivially simple) method - but I am reluctant to mention it without first seeing your ipt file.
Do you have multiple sets of fillets within one feature?
You have to select the correct set of fillets to remove from.
The set of fillets you are working with will highlight a slightly different color.
In the attached I can add to or deselect the ones with a L_BoreRad radius but I would not be able to deselect the one with the M_Rad radius.
(If you are using the goofy junk to the top of that picture you are on your own it only gets in my way, I'll hold off on ranting about Autodesk changing for change's sake later.)