What is a bit quicker is you click on the “silkscreen” folder group in XML, hold shift, and click on the black square on the bottom colour selector - far left -, and everything in the group turns black.
I don’t know if this works in your case, but you right-click on the part and go Edit, Then click to the last group “Connectors” and select how many pins you want. I think there are still remnants in the XML when you remove pins this way, so you might have to manually delete them.
Also in the XML box at the top there is 6 buttons that looked greyed out that actually aren’t, if you click on something and click the 4th one it deletes it - saves doing the notepad bit -.