diff --git a/default_pfx.py b/default_pfx.py
index 7985cd8c..db413d41 100755
--- a/default_pfx.py
+++ b/default_pfx.py
@@ -50,9 +50,12 @@ def make_relative_symlink(target, linkname):
     os.symlink(rel, linkname)
 
 def setup_dll_symlinks(default_pfx_dir, dist_dir):
+    skip_dlls = [ 'amd_ags_x64.dll' ]
     for walk_dir, dirs, files in os.walk(default_pfx_dir):
         for file_ in files:
             filename = os.path.join(walk_dir, file_)
+            if file_ in skip_dlls:
+                continue
             if os.path.isfile(filename) and file_is_wine_builtin_dll(filename):
                 bitness = dll_bitness(filename)
                 if bitness == 32:
diff --git a/proton b/proton
index edfc8068..b3df1c35 100755
--- a/proton
+++ b/proton
@@ -20,7 +20,7 @@ from filelock import FileLock
 #To enable debug logging, copy "user_settings.sample.py" to "user_settings.py"
 #and edit it if needed.
 
-CURRENT_PREFIX_VERSION="6.3-1"
+CURRENT_PREFIX_VERSION="6.3-2"
 
 PFX="Proton: "
 ld_path_var = "LD_LIBRARY_PATH"
@@ -308,6 +308,13 @@ class CompatData:
                     log("Unable to write new registry file to " + self.prefix_dir + "system.reg")
                     pass
 
+            stale_builtins = [self.prefix_dir + "/drive_c/windows/system32/amd_ags_x64.dll",
+                              self.prefix_dir + "/drive_c/windows/syswow64/amd_ags_x64.dll" ]
+            for builtin in stale_builtins:
+                if os.path.lexists(builtin) and file_is_wine_builtin_dll(builtin):
+                    log("Removing stale builtin " + builtin)
+                    os.remove(builtin)
+
         except ValueError:
             log("Prefix has an invalid version?! You may want to back up user files and delete this prefix.")
             #Just let the Wine upgrade happen and hope it works...