Exporting all items

Hello,
We're considering migrating one of our websites to Wordpress and in order to do so we need to export all FC items to CSV or XML. Several years ago functionality was being developed allowing to export/import FC items (I know importing items is in place, but not exporting), content types, and fields but I'm guessing it has since been abandoned? I have an old version of the Pro features plugin but when I try to export it says the plugin is out of date. I'm unable to find a newer version of it. What are my options to achieve this? I don't really need any migrating tool, we can write the WP import script ourselves. We just need to be able to export all items with all their custom field values.
Thank you

hello
1 edit all field and allow exporting value in edit tabs
2 in global config you can display csv export button in backend manager tab
3 in backend you can export item with a button
to export all you can simply display all item in filter and check all and export

Thank you for this. Categories and document types don't seem to get exported correctly. The column is there but it's empty.

did you set yes to export for this field

Yes I did, I tried with raw values and rendered values, the columns appear but are empty.

your flexicontent version ?