Map that has been downloaded/exported 2 times can't be imported

[ufdada]

It shows the message "invalid filename".
It only happens if you import the map via the options menu (not the drag and drop feature).
The filename is "Basions_001 (2).wfto".
This mainly happens because if you export a map 2 times in a row.

There are two things that should be fixed:

• Update version (increment by 1) if the export button was clicked/file was downloaded
• Allow braces in filename
• Filter this kind of filename (rename it to "Basions_001.wfto")
  • filename.replace(/\s\([0-9]{1,}\)/g, "");