well I did that I tried exporting a custom mesh to blender and got a big long error report.
System.AggregateException: One or more errors occurred. ---> System.IO.FileNotFoundException: Could not find file 'C:\Program Files (x86)\Sims 4 Studio\Blender\Scenes\body.blend'.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.File.InternalCopy(String sourceFileName, String destFileName, Boolean overwrite, Boolean checkHost)
at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
at S4Studio.Blender.BlenderUtilities.ExportGeom(String custom_blend, String custom_geom, String custom_texture, String caspart_name, String age, String gender, String type) in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio.Blender\BlenderUtilities.cs:line 314
at S4Studio.MainWindow.<>c__DisplayClass75_0.<ExportToBlenderButton_OnClick>b__1() in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio\UI\MainWindow.xaml.cs:line 1056
at S4Studio.LoadingScreen.<>c__DisplayClass6_0.<Show>b__0() in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio\UI\LoadingScreen.xaml.cs:line 67
at System.Threading.Tasks.Task.InnerInvoke()
at System.Threading.Tasks.Task.Execute()
--- End of inner exception stack trace ---
---> (Inner Exception #0) System.IO.FileNotFoundException: Could not find file 'C:\Program Files (x86)\Sims 4 Studio\Blender\Scenes\body.blend'.
File name: 'C:\Program Files (x86)\Sims 4 Studio\Blender\Scenes\body.blend'
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.File.InternalCopy(String sourceFileName, String destFileName, Boolean overwrite, Boolean checkHost)
at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
at S4Studio.Blender.BlenderUtilities.ExportGeom(String custom_blend, String custom_geom, String custom_texture, String caspart_name, String age, String gender, String type) in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio.Blender\BlenderUtilities.cs:line 314
at S4Studio.MainWindow.<>c__DisplayClass75_0.<ExportToBlenderButton_OnClick>b__1() in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio\UI\MainWindow.xaml.cs:line 1056
at S4Studio.LoadingScreen.<>c__DisplayClass6_0.<Show>b__0() in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio\UI\LoadingScreen.xaml.cs:line 67
at System.Threading.Tasks.Task.InnerInvoke()
at System.Threading.Tasks.Task.Execute()<---