diff --git a/src/Robots.Grasshopper/RobotSystem/LibraryForm.cs b/src/Robots.Grasshopper/RobotSystem/LibraryForm.cs
index 83c2c86..ab2a418 100644
--- a/src/Robots.Grasshopper/RobotSystem/LibraryForm.cs
+++ b/src/Robots.Grasshopper/RobotSystem/LibraryForm.cs
@@ -82,7 +82,15 @@ public LibraryForm(OnlineLibrary library)
 
     async Task RefreshAsync()
     {
-        await _library.UpdateLibraryAsync();
+        try
+        {
+            await _library.UpdateLibraryAsync();
+        }
+        catch (Exception)
+        {
+            MessageBox.Show(this, $"Error refreshing list of libraries. It's possible you reached your refresh limit, please wait one hour for the rate limit to reset.", MessageBoxType.Error);
+        }
+
         var values = _library.Libraries.Values;
         var ordered = values.OrderBy(i => i.Name).ToList();
 
@@ -105,15 +113,24 @@ async Task DownloadAsync()
     {
         var item = (LibraryItem)_detailView.DataContext;
 
-        var success = item switch
+        try
         {
-            { IsUpdateAvailable: true } => await _library.TryDownloadLibraryAsync(item),
-            { IsDownloaded: true } => _library.TryRemoveDownloadedLibrary(item),
-            _ => throw new ArgumentException("Invalid action")
-        };
-
-        if (!success)
-            MessageBox.Show(this, $"{ItemActions(item)} error on {item.Name}", MessageBoxType.Error);
+            switch (item)
+            {
+                case { IsUpdateAvailable: true }:
+                    await _library.DownloadLibraryAsync(item);
+                    break;
+                case { IsDownloaded: true }:
+                    _library.RemoveDownloadedLibrary(item);
+                    break;
+                default:
+                    throw new ArgumentException("Invalid action");
+            }
+        }
+        catch (Exception e)
+        {
+            MessageBox.Show(this, $"{ItemActions(item)} error on {item.Name}.\n\n{e.Message}", MessageBoxType.Error);
+        }
 
         _detailView.UpdateBindings(BindingUpdateMode.Destination);
         _grid.ReloadData(_grid.SelectedRow);
diff --git a/src/Robots/IO/OnlineLibrary.cs b/src/Robots/IO/OnlineLibrary.cs
index bc453fb..f89d7cd 100644
--- a/src/Robots/IO/OnlineLibrary.cs
+++ b/src/Robots/IO/OnlineLibrary.cs
@@ -1,5 +1,5 @@
-using Octokit;
-using System.Security.Cryptography;
+using System.Security.Cryptography;
+using Octokit;
 
 namespace Robots;
 
@@ -34,47 +34,35 @@ public async Task UpdateLibraryAsync()
         AddDiskLibraries(FileIO.LocalLibraryPath, true);
     }
 
-    public async Task<bool> TryDownloadLibraryAsync(LibraryItem library)
+    public async Task DownloadLibraryAsync(LibraryItem library)
     {
         if (!library.IsUpdateAvailable)
             throw new ArgumentException("Library does not require update.");
 
-        if (!await TryDownloadFileAsync(library.Name + ".xml"))
-            return false;
-
-        if (!await TryDownloadFileAsync(library.Name + ".3dm"))
-            return false;
+        await DownloadFileAsync(library.Name + ".xml");
+        await DownloadFileAsync(library.Name + ".3dm");
 
         var xmlPath = Path.Combine(FileIO.OnlineLibraryPath, library.Name + ".xml");
         var sha = GetLocalSha(xmlPath);
 
         if (sha != library.OnlineSha)
-            return false;
+            throw new InvalidDataException("Downloaded file does not match online file.");
 
         library.DownloadedSha = sha;
         LibraryChanged?.Invoke();
-        return true;
     }
 
-    public bool TryRemoveDownloadedLibrary(LibraryItem item)
+    public void RemoveDownloadedLibrary(LibraryItem item)
     {
         var folder = FileIO.OnlineLibraryPath;
         string pathXml = Path.Combine(folder, item.Name + ".xml");
         string path3dm = Path.Combine(folder, item.Name + ".3dm");
 
-        try
-        {
-            File.Delete(pathXml);
-            File.Delete(path3dm);
-        }
-        catch (Exception)
-        {
-            return false;
-        }
+        File.Delete(pathXml);
+        File.Delete(path3dm);
 
         item.DownloadedSha = null;
         LibraryChanged?.Invoke();
-        return true;
     }
 
     async Task AddOnlineLibrariesAsync()
@@ -171,7 +159,7 @@ string GetSha1(byte[] contentBytes)
         return hashText;
     }
 
-    async Task<bool> TryDownloadFileAsync(string fileName)
+    async Task DownloadFileAsync(string fileName)
     {
         var folder = FileIO.OnlineLibraryPath;
 
@@ -180,13 +168,9 @@ async Task<bool> TryDownloadFileAsync(string fileName)
 
         string downloadPath = Path.Combine(folder, fileName);
         var response = await _http.GetAsync(fileName);
-
-        if (response.StatusCode != System.Net.HttpStatusCode.OK)
-            return false;
+        response.EnsureSuccessStatusCode();
 
         var bytes = await response.Content.ReadAsByteArrayAsync();
         File.WriteAllBytes(downloadPath, bytes);
-
-        return true;
     }
 }
\ No newline at end of file