We put thje docs in /usr/doc/qcontrolcenter, not in /usr/share/qcontrolcenter/
The window's titele is Slint Control Centre for Slint. Didier

diff -ru qcontrolcenter/qcontrolcenter/errorDialog.py qcontrolcenter.new/qcontrolcenter/errorDialog.py
--- qcontrolcenter/qcontrolcenter/errorDialog.py	2022-04-13 19:03:12.082874281 +0200
+++ qcontrolcenter.new/qcontrolcenter/errorDialog.py	2022-04-13 19:04:46.368876978 +0200
@@ -48,7 +48,7 @@
 		textContent = QString("")
 		vlay = QtWidgets.QVBoxLayout()
 
-		file = QtCore.QFile("/usr/share/qcontrolcenter/INSTRUCTIONS.txt")
+		file = QtCore.QFile("/usr/doc/qcontrolcenter/INSTRUCTIONS.txt")
 		if (file.open(QtCore.QFile.ReadOnly)):
 			text = file.readAll()
 			codec = QtCore.QTextCodec.codecForHtml(text)
diff -ru qcontrolcenter/qcontrolcenter/helpDialog.py qcontrolcenter.new/qcontrolcenter/helpDialog.py
--- qcontrolcenter/qcontrolcenter/helpDialog.py	2022-04-13 19:03:12.082874281 +0200
+++ qcontrolcenter.new/qcontrolcenter/helpDialog.py	2022-04-13 19:05:50.025878799 +0200
@@ -67,7 +67,7 @@
 		textContent = QString("")
 		vlay = QtWidgets.QVBoxLayout()
 
-		file = QtCore.QFile("/usr/share/qcontrolcenter/INSTRUCTIONS.txt")
+		file = QtCore.QFile("/usr/doc/qcontrolcenter/INSTRUCTIONS.txt")
 		if (file.open(QtCore.QFile.ReadOnly)):
 			text = file.readAll()
 			codec = QtCore.QTextCodec.codecForHtml(text)
@@ -86,7 +86,7 @@
 		textContent = QString("")
 		vlay = QtWidgets.QVBoxLayout()
 
-		file = QtCore.QFile("/usr/share/qcontrolcenter/LICENSE.html")
+		file = QtCore.QFile("/usr/doc/qcontrolcenter/LICENSE.html")
 		if (file.open(QtCore.QFile.ReadOnly)):
 			text = file.readAll()
 			codec = QtCore.QTextCodec.codecForHtml(text)
diff -ru qcontrolcenter/qcontrolcenter/qcontrolcenter.py qcontrolcenter.new/qcontrolcenter/qcontrolcenter.py
--- qcontrolcenter/qcontrolcenter/qcontrolcenter.py	2022-04-13 19:03:12.082874281 +0200
+++ qcontrolcenter.new/qcontrolcenter/qcontrolcenter.py	2022-04-13 19:07:07.241881008 +0200
@@ -41,7 +41,7 @@
 
 def getWindowTitle():
 	#window_title = "qControlCenter"
-	window_title = "Slackel Control Center"
+	window_title = "Slint Control Center"
 	if os.getenv('QCONTROLCENTERTITLE') != None:
 		window_title = os.getenv('QCONTROLCENTERTITLE')
 	return window_title
@@ -106,7 +106,7 @@
 	else:
 		print ("No base structure directory found.")
 		print ("Please read the instructions in this document:")
-		print ("/usr/share/qcontrolcenter/INSTRUCTIONS.txt")
+		print ("/usr/doc/qcontrolcenter/INSTRUCTIONS.txt")
 
 
 # *** MAIN CLASS ***