When generating a register or ledger from the securities section there is a new "As-At" field. This allows you to select a date and generate documents as of that specific date.
When viewing an entity, on the Shares (Units) tab under Securities click on Registers / Ledgers on the right hand side of the screen
Select Current Share Class or All Share Classes
✨ At the top of the new window, you'll find the new field for As-At Date
Set the date in the As-At field for the date you want your documents to be generated as of (alternatively, you can leave this field blank and it will generate the documents as of today's date)
Select the document you wish to generate
See it in action below!