'Permanent 2' sounds like kind of a contradiction.
(It can't really be criticised for its name though, I can't find anything to link 'excel' to spreadsheets either)
'continuing or enduring without fundamental or marked change'
google gives a similar
'lasting or intended to last or remain unchanged indefinitely.'
Both sites list a bunch of synonyms that are closer to long-lasting and durable, but english is subtle. One can't usually swap in a 'synonym' without changing meaning.