1. Added support for connecting to PLCs when "Only secure PG/PC and HMI communication" option is enabled

2. Fixed connection failure errors when PLC has "Only secure PG/PC and HMI communication" enabled

3. Fixed null reference errors when SessionKey is empty due to connection failures

S7CommPlusGUIBrowser/obj/Debug/S7CommPlusGUIBrowser.csproj.CoreCompileInputs.cache

@@ -0,0 +1 @@
+ec14fa67cfbca0656c6c62f93ec1446787c52f00

S7CommPlusGUIBrowser/obj/Debug/S7CommPlusGUIBrowser.csproj.FileListAbsolute.txt

@@ -0,0 +1,17 @@
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\bin\Debug\S7CommPlusGUIBrowser.exe.config
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\bin\Debug\S7CommPlusGUIBrowser.exe
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\bin\Debug\S7CommPlusGUIBrowser.pdb
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\bin\Debug\S7CommPlusDriver.dll
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\obj\Debug\S7CommPlusGUIBrowser.csprojAssemblyReference.cache
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\obj\Debug\S7CommPlusGUIBrowser.Form1.resources
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\obj\Debug\S7CommPlusGUIBrowser.Properties.Resources.resources
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\obj\Debug\S7CommPlusGUIBrowser.csproj.GenerateResource.cache
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\obj\Debug\S7CommPlusGUIBrowser.csproj.CoreCompileInputs.cache
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\obj\Debug\S7CommPlusGUIBrowser.csproj.CopyComplete
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\obj\Debug\S7CommPlusGUIBrowser.exe
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\obj\Debug\S7CommPlusGUIBrowser.pdb
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\bin\Debug\S7PublicKeys.dll
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\bin\Debug\S7Utilities.dll
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\bin\Debug\zlib.net.dll
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\bin\Debug\S7CommPlusAuth.dll
+C:\Users\ShenX\Desktop\DiscoverDevices\S7CommPlusV3Driver\S7CommPlusGUIBrowser\bin\Debug\S7Family0.dll