Since new demoversion was posted for May, those who not supported last month need to purchase the back number.
The back issue can be purchased from the bottom of the demo version post (The article itself can be accessed from the link above).
(English)
As I always inform you, you can download the trial version without any problem even if you cancel the support in the middle of this month.
Currently Ci-en cannot cancel support from 18:00 Japan time at the last day of the month to 0:00 on the 1st of the following month, and those who were supporting by that time will be charged for the next month.