I have seen that Sharpcap got rid of the gamma control on their version 3.1 they said it is because ZWO got rid of gamma
Did you remove the ability to change gamma on the new ASI cameras and if so when was that done?
Most of the solar imagers, and myself, use the gamma to bring out the prominences and the surface differently. We have found that tweaking the gamma is a powerful tool for solar (I also have found reducing gamma helps with lunar, but leave it alone for deep sky)
Jeff