Apologies for the late response.
Firstly, you need to extract the V17 backup zip in Windows, so that it creates the V17 company as a folder. Save the folder in your Xpress18 folder.
Use the Add Company button to add the company to the menu.
Open the company - the system will then upgrade the data files to V18.
There is no need to use the Conversion module for companies created in V12 onwards.
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