Copy several phrases in a text editor and open the Clipboard Manager window. Start deleting the rows one by one. When only one row remains it cannot be deleted. This is a bug in my opinion, because this position will always remain blocked with something copied.
I've attached a screenshot to see what it's all about:
https://mega.nz/file/ChhizIhK#Qyn4Db11_ ... ywSXPs2ACU
FastKeys Clipboard Manager is not deleting the first row
Thanks. This is actually by design, I see no use of deleting regular Windows clipboard content.