ModSlaveSim help v3.04 - 2.8. Export CSV...
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The registers for a slave can be exported to a disk file in comma-separated (CSV) format by selecting the→ menu item. This will bring up a dialog that allows you to enter or select the name of the file to which you want to export the settings.
Note that when you first open this dialog it displays files in your current working directory by default, but you can change this behaviour (see Running ModSlaveSim with file options ).