This should fix most icon scaling issues

Improved the IniReader a bit and replaced some old code.

GreenshotPlugin/Core/Enums/DpiAwareness.cs

@@ -0,0 +1,40 @@
+// Copyright (c) Dapplo and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace GreenshotPlugin.Core.Enums
+{
+    /// <summary>
+    ///     Identifies the dots per inch (dpi) setting for a thread, process, or window.
+    ///     Can be used everywhere ProcessDpiAwareness is passed.
+    /// </summary>
+    public enum DpiAwareness
+    {
+        /// <summary>
+        ///     Invalid DPI awareness. This is an invalid DPI awareness value.
+        /// </summary>
+        Invalid = -1,
+
+        /// <summary>
+        ///     DPI unaware.
+        ///     This process does not scale for DPI changes and is always assumed to have a scale factor of 100% (96 DPI).
+        ///     It will be automatically scaled by the system on any other DPI setting.
+        /// </summary>
+        Unaware = 0,
+
+        /// <summary>
+        ///     System DPI aware.
+        ///     This process does not scale for DPI changes.
+        ///     It will query for the DPI once and use that value for the lifetime of the process.
+        ///     If the DPI changes, the process will not adjust to the new DPI value.
+        ///     It will be automatically scaled up or down by the system when the DPI changes from the system value.
+        /// </summary>
+        SystemAware = 1,
+
+        /// <summary>
+        ///     Per monitor DPI aware.
+        ///     This process checks for the DPI when it is created and adjusts the scale factor whenever the DPI changes.
+        ///     These processes are not automatically scaled by the system.
+        /// </summary>
+        PerMonitorAware = 2
+    }
+}