I just found one issue. The Assist++ documentation dialog is taking all available space from the left to right. It is problematic when you have two windows side by side. It is a common scenario for wider screen with 21:9 or 36:9 proportions. Screenshot with the issue attached.
I would except documentation popup will be within TheIDE window. Also, did you consider changing background color popup. White on white is not the best option and the popup could differentiate itself with different background.
Klugier
Position should be now better. If it needs more finetuning, check CodeEditor::SyncTip.