For anybody struggling since the mandatory update was done, to import your Standard Bank cashbook file (which exports in a *.txt format) - you need to get the CAT option loaded, which needs to appear on your drop down list when importing cashbook Standard Bank statement exports.

I received assistance from Silindo Thabede and this is what she advised which fixed my problem:

Please follow the below steps to ensure Standard bank - Cats appears on the list of Statement Providers.

1. Download the files from the below link
https://sage.thruinc.net/Publishing/Link.aspx?LinkID=0INRP7TBU8IZ1
2. Extract the files (Please use 7 zip to extract the files)
3. Log off Evolution (File | Exit & Log off)
4. Please copy and replace the existing files in the Assembly folder ( e.g: C:\Program Files (x86)\Sage Evolution7.20.9.014\Assembly)
5. Log back in to Evolution - The Statement Bank - Cats should now be available on the list of Statement providers.

Please note the above steps (Steps 3 - 5) will need to be repeated on workstations that needs to use the Standard Bank - Cats statement provider.