I'm a little confused. You say you think you were on v0.26 before you took a break, but you also say the last time you think you played was November.Sadly I deleted that one when I installed 27 some time back - and didn't play - and then recently emptied the trash. They are gone.
V0.27 came out in November.
You say in your first post you downloaded the update today ... but then in this second post you say you installed v0.27 some time back. If you already installed v0.27 ... why did you download the update-only version of v0.27?
If you deleted the game previously or if this is someone's first time playing the game - then it is necessary to download the entire game (see below, marked #1) for the appropriate OS.
Midlife Crisis updates are chapter based. If you have v0.26 installed, then you only need to download the update for v0.27 shown in the OP (see below, marked #2). It's chapter based, so each update file is only that chapter.