That would be nice... I edited 264 logs because I wanted them do be correctly represented by gasoline or LPG (thanks for implementing bi-fuel option). I been using Fuelio for years and bi-fuel was added recently so I had to find a way to edit all previous logs. CSV was my only option (or manually edited them trough Fuelio).

You are right... I manage to import CSV correctly.
I tried to export CSV to edit some values and to import it again and I had a problem... I believe that a problem was headers or something like that. CSV keep adding couple of columns (empty ones) at the end. I manage to manually edit it with text editor.
I think I supposed to split CSV into 3 different ones ("Vehicle", "Log" and "CostCategories"), edit them separately and then combine them before import.

There was no bug... sorry for inconvenience and keep a good work ;)