- File>Create Backup
- Select all the cards
- Notes>Find & Replace, all fields + regular expression, find:
(.*)\{\{c1::(.*)\}\}
replace with
$1|$2
- Select all the cards, and Notes>Change Notetype. Change to the Basic notetype, and map the first field to both front and back, so you get two copies of it.
- Find & replace, this time limit to the Front field. Find:
\|.*
Replace with nothing
6. Again for the back field, this time find:
.*\|
and replace with nothing.