how can i update from the 0.4.3.2 to the 0.4.5 without losing progress?
In most renpy games i have each game in a separate folder to keep all the files separate. I go to the "game" folder and take the "save" folder out (or copy it).
Then I install the new game, run it first, then quit and replace the save folder with the old one. Then you can delete the old version.
This should work 98% of the times, it could be that the dev did mayor restructuring and old saves don't work. But in this case the dev should inform their community about it.