Which path is the new update for, cause I can't seem to trigger the new content? Thanks.
P.S. No I didn't install the IC patch.
This update adds the ending for the Haley route.
So this is the Nikki ending???
Nope, see above, Haley ending.
Right now there isn't a planned Nikki only ending, but she'll be part of the next 2 endings, the Karen + Nikki route (which Stig says will slightly favor Nikki content-wise), and a Harem route ending.
HOWEVER... a few pages back I posted some quotes from Stiglet's Patreon which suggest he will take another look at including a Nikki ending (after the next 2 endings are complete) because of the large demand for it, so for Nikki fans there may be some hope yet!
Was this released too early cause when i click on one of the DL it says PCTest so would it be better to wait or can this be used without issues aside from cest patch thing ?
Correct, this is the test version released to just $20 patrons, it shouldn't have been leaked, the OP shouldn't have been updated and everyone should wait for the general release of 12.2, along with an updated incest patch...
Sometimes saves made in test versions won't be compatible with the proper finished version - it IS playable right now without the patch if you use your saves from a previous (proper release) version but I wouldn't go starting new playthroughs and keeping new saves you make with the test version.