SoftXpand prerequisite:

Microsoft .NET Framework 3.5, service pack 1.

Use this link to download it (English):
https://www.microsoft.com/downloads/details.aspx?FamilyID=AB99342F-5D1A-413D-8319-81DA479AB0D7.

In order to check if you have .NET Framework 3.5, service pack 1 installed on your PC:

1. Check for a local directory: %windir%\Microsoft.NET\Framework\
   Where
   v3.5 - for .NET Framework v3.5
   
   
   
   
2. Check the Windows Registry for
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework
   Where folder: v3.0 SP1 – for .NET Framework v3.5 SP1.