diff --git a/src/NewTools-CodeCritiques/StSingleCritiqueResultListPresenter.class.st b/src/NewTools-CodeCritiques/StSingleCritiqueResultListPresenter.class.st
index 3bc192b8b..76f334f8a 100644
--- a/src/NewTools-CodeCritiques/StSingleCritiqueResultListPresenter.class.st
+++ b/src/NewTools-CodeCritiques/StSingleCritiqueResultListPresenter.class.st
@@ -465,7 +465,7 @@ StSingleCritiqueResultListPresenter >> updateList [
 
 	| delay |
 	self critiquesOf: rule.
-	delay := [ UIManager default defer: [ critiquesModel updateList ] ]
+	delay := [ self defer: [ critiquesModel updateList ] ]
 		          schedule
 ]
 
diff --git a/src/NewTools-Debugger/StDebugger.class.st b/src/NewTools-Debugger/StDebugger.class.st
index 68a94c42c..e55b36ed8 100644
--- a/src/NewTools-Debugger/StDebugger.class.st
+++ b/src/NewTools-Debugger/StDebugger.class.st
@@ -1070,10 +1070,11 @@ StDebugger >> requestSuperclassOf: aClass to: aSuperclass [
 	classes addAll:
 		(aClass traits sort: [ :t1 :t2 | t1 asString < t2 asString ]).
 	classes size = 1 ifTrue: [ ^ classes first ].
-	^ (UIManager default
-		   chooseFrom: (classes collect: [ :c | c name ])
-		   values: classes
-		   title: 'Define selector in:') ifNil: [ Abort signal ]
+	^ (self application newSelect
+		   display: [ :each | each name ];
+		   item: classes;
+		   title: 'Define selector in:'; 
+		   openModal) ifNil: [ Abort signal ]
 ]
 
 { #category : #actions }
@@ -1089,8 +1090,10 @@ StDebugger >> restartCurrentContext [
 StDebugger >> returnEnteredValue [
 	| expression |
 	self flag: #DBG_HowToTestNilIfUserCancels.
-	expression := (UIManager default
-		request: 'Enter expression for return value:') ifNil: [^self].
+	expression := (self application newRequest
+		title: 'Enter expression for return value:';
+		openModal
+		) ifNil: [^self].
 	self debuggerActionModel
 		returnValueFromExpression: expression
 		fromContext: self currentContext
diff --git a/src/NewTools-MethodBrowsers/StMessageBrowserPresenter.class.st b/src/NewTools-MethodBrowsers/StMessageBrowserPresenter.class.st
index beced233d..f07d384bb 100644
--- a/src/NewTools-MethodBrowsers/StMessageBrowserPresenter.class.st
+++ b/src/NewTools-MethodBrowsers/StMessageBrowserPresenter.class.st
@@ -139,7 +139,7 @@ StMessageBrowserPresenter >> autoSelect: aSelector [
 { #category : #announcements }
 StMessageBrowserPresenter >> classRenamed: anAnnouncement [ 
 	"this method forces the announcement to be handled in the UI process"
-	UIManager default defer: [ 
+	self defer: [ 
 		self handleClassRenamed: anAnnouncement ]
 ]
 
@@ -346,7 +346,7 @@ StMessageBrowserPresenter >> messages: aCollection [
 { #category : #announcements }
 StMessageBrowserPresenter >> methodAdded: anAnnouncement [
 	"this method forces the announcement to be handled in the UI process"
-	UIManager default defer: [ 
+	self defer: [ 
 		self handleMethodAdded: anAnnouncement ]
 ]
 
@@ -358,14 +358,14 @@ StMessageBrowserPresenter >> methodClassNameForItem: anItem [
 { #category : #announcements }
 StMessageBrowserPresenter >> methodModified: anAnnouncement [
 	"this method forces the announcement to be handled in the UI process"
-	UIManager default defer:  [	
+	self defer:  [	
 		self handleMethodModified: anAnnouncement ]
 ]
 
 { #category : #announcements }
 StMessageBrowserPresenter >> methodRemoved: anAnnouncement [
 	"this method forces the announcement to be handled in the UI process"
-	UIManager default defer:  [ 
+	self defer:  [ 
 		self handleMethodRemoved: anAnnouncement ]
 ]
 
diff --git a/src/NewTools-MethodBrowsers/StVersionBrowserPresenter.class.st b/src/NewTools-MethodBrowsers/StVersionBrowserPresenter.class.st
index 49bbb4e74..d2d08c5c6 100644
--- a/src/NewTools-MethodBrowsers/StVersionBrowserPresenter.class.st
+++ b/src/NewTools-MethodBrowsers/StVersionBrowserPresenter.class.st
@@ -129,7 +129,7 @@ StVersionBrowserPresenter >> compareToOtherVersion [
 	| labels versions index selected |
 	versions := self changeList.
 	labels := versions collect: [ :each | each stamp ].
-	index := UIManager default chooseFrom: labels.
+	index := self application newSelect title: 'Select a version'; item: labels; openModal.
 	index > 0 ifFalse: [ ^ self ].
 	selected := versions at: index.
 	self compareTo: selected withLabel: selected stamp
diff --git a/src/NewTools-Spotter/StSpotter.class.st b/src/NewTools-Spotter/StSpotter.class.st
index 1a29dc9c7..07a13a8cf 100644
--- a/src/NewTools-Spotter/StSpotter.class.st
+++ b/src/NewTools-Spotter/StSpotter.class.st
@@ -397,7 +397,7 @@ StSpotter >> feedTip [
 { #category : #'private - updating' }
 StSpotter >> flushPendingUpdates [
 
-	self application defer: [ 
+	self defer: [ 
 		self model schedule: [ 
 			mutex critical: [ 
 				[ 
@@ -440,7 +440,7 @@ StSpotter >> headerCategoryUnifiedFor: aLink [
 { #category : #'private - actions' }
 StSpotter >> hideSpinner [
 
-	self application defer: [ spinner hide ]
+	self defer: [ spinner hide ]
 ]
 
 { #category : #'private - actions' }
@@ -771,7 +771,7 @@ StSpotter >> showSpinner [
 
 	spinner isVisible ifTrue: [ ^ self ].
 	self model schedule: [
-		self application defer: [ spinner show ]]
+		self defer: [ spinner show ]]
 ]
 
 { #category : #processing }
@@ -882,7 +882,7 @@ StSpotter >> updateResultList: aCandidateLink [
 { #category : #'private - updating' }
 StSpotter >> updateResultProcessor: processor amount: amount [
 
-	self application defer: [ 
+	self defer: [ 
 		categories 
 			at: processor 
 			ifPresent: [ :aPresenter | aPresenter finalAmount: amount ] ]