diff --git a/src/logic/DebugProfile.swift b/src/logic/DebugProfile.swift
index 24211440..77385920 100644
--- a/src/logic/DebugProfile.swift
+++ b/src/logic/DebugProfile.swift
@@ -44,7 +44,7 @@ class DebugProfile {
     private static func appPreferences() -> String {
         return nestedSeparator + Preferences.all
                 .sorted { $0.0 < $1.0 }
-                .map { $0.key + intraSeparator + Preferences.getAsString($0.key)! }
+                .map { $0.key + intraSeparator + Preferences.getAsString($0.key) }
                 .joined(separator: nestedSeparator)
     }
 
diff --git a/src/logic/Preferences.swift b/src/logic/Preferences.swift
index 48729e83..8c81c0d1 100644
--- a/src/logic/Preferences.swift
+++ b/src/logic/Preferences.swift
@@ -61,19 +61,23 @@ class Preferences {
         defaults.register(defaults: defaultValues)
     }
 
-    static func get(_ key: String) -> Any? {
+    static func getObject(_ key: String) -> Any? {
         defaults.object(forKey: key)
     }
 
-    static func getAsString(_ key: String) -> String? {
+    static func getString(_ key: String) -> String? {
         defaults.string(forKey: key)
     }
 
+    static func getAsString(_ key: String) -> String {
+        String(describing: defaults.object(forKey: key))
+    }
+
     static func set(_ key: String, _ value: Any?) {
         defaults.set(value, forKey: key)
     }
 
-    static var all: [String: Any] { defaults.dictionaryRepresentation() }
+    static var all: [String: Any] { defaults.persistentDomain(forName: NSRunningApplication.current.bundleIdentifier!)! }
 }
 
 struct Theme {
diff --git a/src/ui/preferences-window/LabelAndControl.swift b/src/ui/preferences-window/LabelAndControl.swift
index 1884870a..6a23b056 100644
--- a/src/ui/preferences-window/LabelAndControl.swift
+++ b/src/ui/preferences-window/LabelAndControl.swift
@@ -2,7 +2,7 @@ import Cocoa
 
 class LabelAndControl: NSObject {
     static func makeLabelWithInput(_ labelText: String, _ rawName: String, _ width: CGFloat, _ suffixText: String? = nil, _ suffixUrl: String? = nil, _ validator: ((String) -> Bool)? = nil) -> [NSView] {
-        let input = TextField(Preferences.getAsString(rawName)!)
+        let input = TextField(Preferences.getString(rawName)!)
         input.validationHandler = validator
         input.delegate = input
         input.visualizeValidationState()
@@ -13,19 +13,19 @@ class LabelAndControl: NSObject {
 
     static func makeLabelWithCheckbox(_ labelText: String, _ rawName: String, extraAction: ActionClosure? = nil) -> [NSView] {
         let checkbox = NSButton(checkboxWithTitle: "", target: nil, action: nil)
-        setControlValue(checkbox, Preferences.getAsString(rawName)!)
+        setControlValue(checkbox, Preferences.getString(rawName)!)
         return makeLabelWithProvidedControl(labelText, rawName, checkbox, extraAction: extraAction)
     }
 
     static func makeLabelWithDropdown(_ labelText: String, _ rawName: String, _ values: [String], _ suffixText: String? = nil) -> [NSView] {
         let popUp = NSPopUpButton()
         popUp.addItems(withTitles: values)
-        popUp.selectItem(withTitle: Preferences.getAsString(rawName)!)
+        popUp.selectItem(withTitle: Preferences.getString(rawName)!)
         return makeLabelWithProvidedControl(labelText, rawName, popUp, suffixText)
     }
 
     static func makeLabelWithSlider(_ labelText: String, _ rawName: String, _ minValue: Double, _ maxValue: Double, _ numberOfTickMarks: Int, _ allowsTickMarkValuesOnly: Bool, _ unitText: String = "") -> [NSView] {
-        let value = Preferences.getAsString(rawName)!
+        let value = Preferences.getString(rawName)!
         let suffixText = value + " " + unitText
         let slider = NSSlider()
         slider.minValue = minValue