diff --git a/src/logic/Preferences.swift b/src/logic/Preferences.swift
index 1782650b..2de7d43a 100644
--- a/src/logic/Preferences.swift
+++ b/src/logic/Preferences.swift
@@ -169,23 +169,36 @@ class Preferences {
     }
 
     private static func updateToNewPreferences(_ currentVersion: String) {
-        if currentVersion.compare("6.27.1", options: .numeric) != .orderedDescending {
-            // "Start at login" new implem doesn't use Login Items; we remove the entry from previous versions
-            migrateLoginItem()
-            if currentVersion.compare("6.23.0", options: .numeric) != .orderedDescending {
-                // "Show windows from:" got the "Active Space" option removed
-                migrateShowWindowsFrom()
-                if currentVersion.compare("6.18.1", options: .numeric) != .orderedDescending {
-                    // nextWindowShortcut used to be able to have modifiers already present in holdShortcut; we remove these
-                    migrateNextWindowShortcuts()
-                    // dropdowns preferences used to store English text; now they store indexes
-                    migrateDropdownsFromTextToIndexes()
-                    // the "Hide menubar icon" checkbox was replaced with a dropdown of: icon1, icon2, hidden
-                    migrateMenubarIconFromCheckboxToDropdown()
-                    // "Show minimized/hidden/fullscreen windows" checkboxes were replaced with dropdowns
-                    migrateShowWindowsCheckboxToDropdown()
-                    // "Max size on screen" was split into max width and max height
-                    migrateMaxSizeOnScreenToWidthAndHeight()
+        if currentVersion.compare("6.28.1", options: .numeric) != .orderedDescending {
+            migrateMinMaxWindowsWidthInRow()
+            if currentVersion.compare("6.27.1", options: .numeric) != .orderedDescending {
+                // "Start at login" new implem doesn't use Login Items; we remove the entry from previous versions
+                migrateLoginItem()
+                if currentVersion.compare("6.23.0", options: .numeric) != .orderedDescending {
+                    // "Show windows from:" got the "Active Space" option removed
+                    migrateShowWindowsFrom()
+                    if currentVersion.compare("6.18.1", options: .numeric) != .orderedDescending {
+                        // nextWindowShortcut used to be able to have modifiers already present in holdShortcut; we remove these
+                        migrateNextWindowShortcuts()
+                        // dropdowns preferences used to store English text; now they store indexes
+                        migrateDropdownsFromTextToIndexes()
+                        // the "Hide menubar icon" checkbox was replaced with a dropdown of: icon1, icon2, hidden
+                        migrateMenubarIconFromCheckboxToDropdown()
+                        // "Show minimized/hidden/fullscreen windows" checkboxes were replaced with dropdowns
+                        migrateShowWindowsCheckboxToDropdown()
+                        // "Max size on screen" was split into max width and max height
+                        migrateMaxSizeOnScreenToWidthAndHeight()
+                    }
+                }
+            }
+        }
+    }
+
+    private static func migrateMinMaxWindowsWidthInRow() {
+        ["windowMinWidthInRow", "windowMaxWidthInRow"].forEach {
+            if let old = defaults.string(forKey: $0) {
+                if old == "0" {
+                    defaults.set("1", forKey: $0)
                 }
             }
         }
diff --git a/src/ui/main-window/ThumbnailView.swift b/src/ui/main-window/ThumbnailView.swift
index 2fc9e4a7..1cf39092 100644
--- a/src/ui/main-window/ThumbnailView.swift
+++ b/src/ui/main-window/ThumbnailView.swift
@@ -151,13 +151,14 @@ class ThumbnailView: NSStackView {
         if appIconChanged || dockLabelChanged {
             setAccessibilityHelp(getAccessibilityHelp(element.application.runningApplication.localizedName, element.dockLabel))
         }
-        assignIfDifferent(&frame.size.width, max((Preferences.hideThumbnails ? hStackView.fittingSize.width : thumbnail.frame.size.width) + Preferences.intraCellPadding * 2, ThumbnailView.widthMin(screen)).rounded())
+        let widthMin = ThumbnailView.widthMin(screen)
+        assignIfDifferent(&frame.size.width, max((Preferences.hideThumbnails ? hStackView.fittingSize.width : thumbnail.frame.size.width) + Preferences.intraCellPadding * 2, widthMin).rounded())
         assignIfDifferent(&frame.size.height, newHeight)
         let fontIconWidth = CGFloat([fullscreenIcon, minimizedIcon, hiddenIcon, spaceIcon].filter { !$0.isHidden }.count) * (Preferences.fontHeight + Preferences.intraCellPadding)
         assignIfDifferent(&label.textContainer!.size.width, frame.width - Preferences.iconSize - Preferences.intraCellPadding * 3 - fontIconWidth)
         assignIfDifferent(&windowlessIcon.isHidden, !element.isWindowlessApp || Preferences.hideThumbnails)
         if element.isWindowlessApp {
-            let maxWidth = (ThumbnailView.widthMin(screen) - Preferences.intraCellPadding * 2).rounded()
+            let maxWidth = (widthMin - Preferences.intraCellPadding * 2).rounded()
             let maxHeight = ((ThumbnailView.height(screen) - hStackView.fittingSize.height) - Preferences.intraCellPadding * 2).rounded()
             // heuristic to determine font size based on bounding box
             let fontSize = (min(maxWidth, maxHeight) * 0.6).rounded()
diff --git a/src/ui/preferences-window/tabs/AppearanceTab.swift b/src/ui/preferences-window/tabs/AppearanceTab.swift
index 50c98c32..4076a0b6 100644
--- a/src/ui/preferences-window/tabs/AppearanceTab.swift
+++ b/src/ui/preferences-window/tabs/AppearanceTab.swift
@@ -7,8 +7,8 @@ class AppearanceTab {
 
     static func initTab() -> NSView {
         rowsCount = LabelAndControl.makeLabelWithSlider(NSLocalizedString("Rows of thumbnails:", comment: ""), "rowsCount", 1, 20, 20, true)
-        minWidthInRow = LabelAndControl.makeLabelWithSlider(NSLocalizedString("Window min width in row:", comment: ""), "windowMinWidthInRow", 0, 100, 10, true, "%", extraAction: { _ in capMinMaxWidthInRow() })
-        maxWidthInRow = LabelAndControl.makeLabelWithSlider(NSLocalizedString("Window max width in row:", comment: ""), "windowMaxWidthInRow", 0, 100, 10, true, "%", extraAction: { _ in capMinMaxWidthInRow() })
+        minWidthInRow = LabelAndControl.makeLabelWithSlider(NSLocalizedString("Window min width in row:", comment: ""), "windowMinWidthInRow", 1, 100, 10, true, "%", extraAction: { _ in capMinMaxWidthInRow() })
+        maxWidthInRow = LabelAndControl.makeLabelWithSlider(NSLocalizedString("Window max width in row:", comment: ""), "windowMaxWidthInRow", 1, 100, 10, true, "%", extraAction: { _ in capMinMaxWidthInRow() })
 
         let grid = GridView([
             LabelAndControl.makeLabelWithDropdown(NSLocalizedString("Theme:", comment: ""), "theme", ThemePreference.allCases),