Installed current version of SRDx on my macOS 10.15 or older computer. Now getting error message when starting.

The error message can be different. Most often your get something like "Could not complete the SRDx command, because file was not found." 

But it can also claims that "Could not complete the SRDx command because there is not enough memory (RAM)", or some function could not be executed. 

In all the cases, please not that the current v.1.3.3.1 of the SRDx for Photoshop Plug-in software needs macOS 11 as a minimum requirement. 

However, on macOS up to 10.15, you still to use the version 1.3.2.0, which you can download from: 
http://www.silverfast.com/download/support2/lsipssrdx1.3.2.0.pkg

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