I am new here so apologies if this question has already been answered.
I understand that the max encrypted filename length is set when a vault is created and then this setting is stored in the vault.cryptomator file, although this itself is encrypted. What is the easiest way to check what this value was set to for an existing vault please?
That’s correct. If you want to change it create a new vault, set the new value during vault creation and transfer the files from the old vault to the new vault.