The Investment Dominator allows you to import data into the system in CSV Lists, but it is worth noting that they have to be in the correct format, starting with the file type. As you might know, there are several CSV formats, the only supported one is CSV (Comma delimited). This is how it looks like in Excel for Windows:
Any of the other CSV formats will not work, and throw the ‘Unknown file format’ error.
Note: If you are using Excel for Mac, you want to check this article:
Which CSV format should I select in Excel on a MAC when creating an import file for Investment Dominator?