Destroy the UI processes upon entering the SpaceCentre. This will mitigate issues that can arrise that may cause the 'Progress' window to remain visible indefinitely.

CYBUTEK · CYBUTEK · commit a52b3a50aca4 · 2016-10-13T14:24:59.000+01:00
diff --git a/KSP-AVC/Starter.cs b/KSP-AVC/Starter.cs
@@ -98,6 +98,11 @@ protected void Start()
 
         protected void Update()
         {
+            if (HighLogic.LoadedScene == GameScenes.SPACECENTER)
+            {
+                Destroy(gameObject);
+            }
+
             try
             {
                 if (this.firstRunGui != null)

Original file line number	Diff line number	Diff line change
`@@ -98,6 +98,11 @@ protected void Start()`
`98`	`98`
`99`	`99`	`protected void Update()`
`100`	`100`	`{`
	`101`	`+ if (HighLogic.LoadedScene == GameScenes.SPACECENTER)`
	`102`	`+ {`
	`103`	`+ Destroy(gameObject);`
	`104`	`+ }`
	`105`	`+`
`101`	`106`	`try`
`102`	`107`	`{`
`103`	`108`	`if (this.firstRunGui != null)`