Would recommend starting a new save file with this update! Aside from the potential for weird bugs, you won't have access to the new upgrades/blueprints otherwise. 

> NEW STUFF

• 18 new stamp art designs!
• KAN-Post starter stamp packs revised:
  • they now draw set distributions from a pool of potential stamps
  • there's 3 levels of starter stamp packs
  • each upgraded pack draws more stamps and had access to a bigger stamp art pool
  • [balance-tweaks] tweaked the stamp distributions (more loonies and toonies)
  • [balance-tweaks] limited the generation of $4 stamps
• several new ships have docked: introducing the Galleon, RMS Mary Paddlewheel, Schooner 2.0, and the sailing dinghy blueprints! 
• a ship has gotten lost at sea: RIP schooner 1.0
• [balance-tweaks] reduced overweight surcharges for intermediate cost price chart

• rendering speed improved, performance ++ for main menu and rulebook page flipping
• better internal tools for snooping through your buggy save files
• endless mode now has a weekly fee of 10$, and it's now possible to lose if you miss 2 loan payments in a row
• new upgrade: offering to the sea (spawns big ships tomorrow)
• new upgrade: lvl 3 starter pack (more stamps, bigger art pool)
• new upgrade: nautical flags laminated poster (handy infographic + stamp storage on reverse)
• windowed-mode option in settings for downloaded builds
• (mild) tutorialization efforts:
  • more sticky notes targeting things players were getting stuck on (mainly the dog-eared corner page flip)
  • hoppla20 autosorter manual split into 2 components, unlocked with each upgrade respectively
  • rubber stamper instructions expanded to include the controls: RIGHT-CLICK or R to stamp package
  • controls list in rulebook expanded

> BUG FIXES

• rip 75c duplication loophole, my condolences
• fixed the black-screen issue (null-ref with stamps preserved on packages till the next day)
• fixed the item position and stamp storage page resetting issue with using the 75cent stamp
• fixed days being skipped by spam-clicking "click to continue" after buying an upgrade
• fixed stamper getting stuck in the shelf if returned mid-stamping-action
• patched Q hotkey still "working" even if the shed storage wasn't unlocked yet
• fixed the gilded stamp counting as underpaid if applied in the days before a price chart update
• newspaper and notices now respawn to correct start position when dragged off desk
• patched stuff on rulebook not blocking notes from being added into it
• fixed postage and stamp prints not being able to be applied through n parcel's "hole(s)"
• all non-package items should now drop to desk on mouse up when shipping is opened
• added "coyote time" to the hockey stick in terms of collider for stamp placement
• fixed rulebook tilt issue when adding multiple notes quickly
• fixed the parenting issues with the scale weighing items that didn't look like they should be weighed (specifically when taking a parcel out of a blueprint/storage that was previously on the scale, and the scale had changed locations in the meantime)
• EDIT: gilded stamp hotfix for parcels stamped on a previous day reading as 0$ paid rather than perfect cost
• EDIT: hotfix for overweight surcharges being incorrect
• EDIT: hotfix for the hotfix above -- hack for updating everyone's save files to circumvent this bug