You will need to do something in this update. See below “Clear “input_fan_speed_off” YAML”.
New Features 
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Multiple Fan Speed Control - If you are using a fan with multiple speeds, you can now select 2 different speeds. We have called them “High” and “Low” but your selection could be “Med - Low” or “High - Med” etc. Before you could only turn OFF a multi speed fan, now you can select to run on high speed for X amount of time to then run on low speed for X amount of time, then turn OFF. You can also select to have different options for summer and winter, as in winter it could be advantageous to run the fan for a longer time period on low speed and in summer you could just turn it OFF
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Lights Time Delay - If using the lights options you now have a separate time delay for them. This was added as you may not need the lights ON the entire time the fan is running
Bugs Fixes 
- Turn OFF By-pass, the rising humidity is above set point and fans / lights (if enabled) are off? Fans and lights (if enabled) will now turn ON.
- HA restart - If rising humidity is above and fans / lights are off, fans and lights (if enabled) will now turn ON.
BLUEPRINT CODE UPDATE 
Just a heads up if your still on a old HA version before you update.
From time to time Home Assistant update their code structure and the old code will become “DEPRECATED” stopping / breaking automations from working. It effected this blueprint about 4 to 6 months ago. I wanted to wait some time so everyone had a chance to update their HA version before updating the code as older HA versions can not run the new code. This blueprint has now been updated so it will still operate once HA remove the “DEPRECATED” code from their system.
Clear “input_fan_speed_off” YAML 
To clear your HA “input_fan_speed_off” YAML please follow these steps.
1 - Update you blueprint and open your automations.
2 - Click on the 3 dots top right.
3 - We are looking for the code , “input_fan_speed_off” as shown below. If you don’t see this code then you are all good, no need to do anything further. If you see this code then continue to read on.
or like this
4 - If you see the code then delete it, click save then the 3 dots and “edit in visual editor”.
5 - If required, select your options for fan speed control again under summer and winter settings. If you are using low speed then you will have to input for low speed switch. Then click save.
6 - Your all done.
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Enjoy
Blacky 