Hello Alain,
Thank you for your message.
Please make sure that you use Host and Viewer of the same version, e.g.
7.0.0.3. The File Transfer mode was completely rewritten starting version 7, so if your Host and Viewer versions are mismatching, then similar issues might occur. For more information please see this
blog post.
In case if your Host and Viewer are not of the same version, you can update them via the
Self-Update feature. Alternatively, the latest version 7.0.0.3 of Remote Utilities is available for download on
this page.
Hope that helps.