Can't import or export (Solved!)

Please help, I get this error message when trying to import or export Mesh on sims4studio:


The Sims 4 Studio - Version 3.1.2.2

System.AggregateException: One or more errors occurred. ---> S4Studio.Blender.BlenderException:

File "<string>", line 1, in <module>

File "<string>", line 59, in <module>

AttributeError: 'Mesh' object has no attribute 's4studio'





at S4Studio.Blender.BlenderUtilities.RunBlender(String script, String blend, Boolean background, Boolean check_version)

at S4Studio.Blender.BlenderUtilities.ExportGeom(String custom_blend, String custom_geom, String custom_texture, String caspart_name, String mannequin_folder, String mannequin_texture, String rig_resource)

at S4Studio.ViewModels.CAS.CASLODItem.ExportMesh(BlenderUtilities blender_util, String blender_path)

at S4Studio.ViewModels.CAS.CASStandalone.<>c__DisplayClass74_0.<ExecuteExportMesh>b__0()

at System.Threading.Tasks.Task.InnerInvoke()

at System.Threading.Tasks.Task.Execute()

--- End of inner exception stack trace ---

---> (Inner Exception #0) S4Studio.Blender.BlenderException:

File "<string>", line 1, in <module>

File "<string>", line 59, in <module>

AttributeError: 'Mesh' object has no attribute 's4studio'





at S4Studio.Blender.BlenderUtilities.RunBlender(String script, String blend, Boolean background, Boolean check_version)

at S4Studio.Blender.BlenderUtilities.ExportGeom(String custom_blend, String custom_geom, String custom_texture, String caspart_name, String mannequin_folder, String mannequin_texture, String rig_resource)

at S4Studio.ViewModels.CAS.CASLODItem.ExportMesh(BlenderUtilities blender_util, String blender_path)

at S4Studio.ViewModels.CAS.CASStandalone.<>c__DisplayClass74_0.<ExecuteExportMesh>b__0()

at System.Threading.Tasks.Task.InnerInvoke()

at System.Threading.Tasks.Task.Execute()<---






I also noticed that when I was working in Blender I didn't have the option sims4studio CAS Tools (But I know I need this but also have no idea how to get it on my blender  )

I was also able to export the full body mesh (I used a swimsuit as I'm making a dress) and somehow I was able to export that? Oh and I was also able to export a dress for the uv_1 without problem    and then when I was fully done I noticed the Sims4Studio CAS Tools was gone and then I noticed I kept getting the error message on Sims4Studio whenever I try to export or import Mesh??? 

If anyone wants to know I use blender 2.70 like it says I need on Sims4Studio (And I'm pretty sure that's also what I was using on my old computer.) (I've also tried reinstalling Blender 2.70 but that didn't help?)

This was the first time I tried making new cc on my new laptop, previously I had always been making them on my computer without any problems.
(Please help, I really want to be able to make cc again as I love doing that!)