Presuming this is not a laguage setting issue (, instead of .), it may be worth trying to Ctrl+Alt+Shift/Cmd+Option+Shift during startup or to Move the folder in order to reset (some of) the preferences.
Edit: Or what Tie & Die said.
It works here for setting it to .25 or .2, as for the align stroke keep in mind it has to be a closed path.
There is no inside or outside of an open path.
You can shoot me the head! I decided to restart and seems to be working fine now.