In case you want to edit the imported XLS/CSV files, please note that there are a few applications that change the file format so that the file cannot be imported anymore.
XLS File
This file can be edited with Microsoft Excel. We have tested the following applications which can be used by you as well:
Windows: Microsoft Excel, LibreOffice (please save in MS Excel format “xlsx”)
Mac OS: Microsoft Excel, LibreOffice (please save in MS Excel format “xlsx”)
Linux: LibreOffice (please save in MS Excel format “xlsx”)
CSV File
It is recommended not to edit this file in Excel as Excel can change the formatting when the file is saved. Simple text editors are suitable for this kind of file.