PSS 1.5 bug fixes:

• D ending hint box dialogue should no longer be escaping the containment of the box.
• Fixed a bug in the E ending where 1 sprite would display as Renpy's default "image not found" placeholder.

Your saves from 1.4 SHOULD be intact if you just run 1.5, but if for some reason they're missing,go into the game/saves subfolder in 1.4, copy the files, and paste them into the same subfolder in 1.5.