Help! Is there anything I can do to fix this ripple/implant knuckle?

 I am sorry to hear about your concerns after breast augmentation surgery. Based on your description and photograph, it is very likely that your feeling/seeing the breast implant.   Some general thoughts may be helpful to you:Palpability and rippling of breast implants may be related to several factors. These include the amount of soft tissue and breast tissue coverage over the breast implants, the position of the breast implants (submuscular versus sub glandular), the type of implants (saline versus silicone), and the degree of overfilling of saline filled implants. Generally, weight loss will extension weight any rippling/palpability of the implants. Deflation of the implants will also increase the rippling/palpability of saline implants.
Correction of the rippling may involve further surgery including implant pocket exchange if possible (sub glandular to submuscular), implant exchange if possible (saline to silicone), and/or the use of allograft (acellular dermal matrix) to provide an additional layer of tissue between the implant and the patient's skin.  
In-person consultation with board-certified plastic surgeons who can demonstrate significant experience helping patients with this type of revisionary breast surgery will be your next best step. Best wishes.

Based on your photos the ripple may be related to the implant being above the muscle. This may not change and sometimes fat grafting to the area can be helpful to hide the wrinkle