Can't load gen 2 savegame when one is already opened

[suloku]

When a gen 2 savegame is already loaded in pkhex, attempting to load a different one (or reload the same one) results in the following error:

Exception Details:
System.ArgumentOutOfRangeException: InvalidArgument=Value of '0' is not valid for 'SelectedIndex'.
Parameter name: SelectedIndex
   at System.Windows.Forms.ComboBox.set_SelectedIndex(Int32 value)
   at PKHeX.WinForms.Main.validateComboBox(Object sender)
   at PKHeX.WinForms.Main.validateComboBox(Object sender, CancelEventArgs e)
   at System.Windows.Forms.Control.OnValidating(CancelEventArgs e)
   at System.Windows.Forms.ComboBox.OnValidating(CancelEventArgs e)
   at System.Windows.Forms.Control.NotifyValidating()
   at System.Windows.Forms.Control.PerformControlValidation(Boolean bulkValidation)
   at System.Windows.Forms.Control.PerformContainerValidation(ValidationConstraints validationConstraints)
   at System.Windows.Forms.Control.PerformContainerValidation(ValidationConstraints validationConstraints)
   at System.Windows.Forms.Control.PerformContainerValidation(ValidationConstraints validationConstraints)
   at System.Windows.Forms.Control.PerformContainerValidation(ValidationConstraints validationConstraints)
   at System.Windows.Forms.Control.PerformContainerValidation(ValidationConstraints validationConstraints)
   at System.Windows.Forms.ContainerControl.ValidateChildren(ValidationConstraints validationConstraints)
   at System.Windows.Forms.Form.ValidateChildren(ValidationConstraints validationConstraints)
   at System.Windows.Forms.Form.ValidateChildren()
   at PKHeX.WinForms.Main.preparePKM(Boolean click)
   at PKHeX.WinForms.Main.openSAV(SaveFile sav, String path)
   at PKHeX.WinForms.Main.openFile(Byte[] input, String path, String ext)
   at PKHeX.WinForms.Main.openQuick(String path, Boolean force)

Loaded Assemblies:
--------------------
mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
C:\Windows\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll

PKHeX, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
C:\Users\sergi\Desktop\celebi\PKHeX.exe

System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll

System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Windows.Forms\v4.0_4.0.0.0__b77a5c561934e089\System.Windows.Forms.dll

System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Drawing\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll

System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Core\v4.0_4.0.0.0__b77a5c561934e089\System.Core.dll

System.Configuration, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll

System.Xml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.dll

System.Windows.Forms.resources, Version=4.0.0.0, Culture=es, PublicKeyToken=b77a5c561934e089
C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Windows.Forms.resources\v4.0_4.0.0.0_es_b77a5c561934e089\System.Windows.Forms.resources.dll

mscorlib.resources, Version=4.0.0.0, Culture=es, PublicKeyToken=b77a5c561934e089
C:\Windows\Microsoft.Net\assembly\GAC_MSIL\mscorlib.resources\v4.0_4.0.0.0_es_b77a5c561934e089\mscorlib.resources.dll

--------------------
User Message:
Unable to load file.
Path: C:\Users\suloku\Desktop\celebi\PCNYCrystal.sav

[kwsch]

Are you using the latest commits or the last release?
https://github.com/kwsch/PKHeX/issues?utf8=%E2%9C%93&q=is%3Aissue%20validateComboBox