There are two ways to put a case file out of the way, and they are nothing alike. Archiving loses nothing. Deleting removes the proceedings (their parties, deadlines and conversations) and cannot be undone; the matter's papers stay.
Both are in the three-dot menu on the row, in the Case files list, and in the More options button of each case file in the sidebar.
Archiving
Archive marks the case file as finished. It does not delete or move anything: its exhibits, parties, facts, dates and conversations stay where they were, and you can open and consult it just as before. In the list and on its page it carries the Archived label, and the Open filter leaves it out.
It happens as soon as you click, without asking, because there is nothing to lose. To undo it, click Reopen in the same menu.
Deleting
Delete case file (Delete in the sidebar) removes the proceedings for good. Before doing so, JUDLEX opens the Delete the whole case file? warning and counts exactly what is going to be lost:
The parties.
The facts, which stop being read from this case file but stay with the matter, and the due dates.
The signed deadline worksheets, if any.
The chat conversations about that case file, if any.
Click Delete permanently to confirm, or Cancel.
The matter's papers stay
Deleting a case file does not touch the client's paperwork. The warning says so, with the numbers: the matter's originals and papers are not deleted and stay in the matter, with their folders. The proceedings go, not the paperwork. You can build another case file on the matter whenever you need to.
If this was the matter's last case file, the warning also has a box: Also delete the matter and all its paperwork (this is its last case). It starts unticked. Only if you tick it is the whole matter deleted as well: its originals, its papers, its folders, its facts and its folder on disk. When you tick it, the warning turns red and says how much will go.