Hi @Hayk_Martiros,
Welcome to the Streamlit community! 
The clear_cache method has moved to streamlit.legacy_caching.clear_cache.
With the 0.89.0 release, we have updated the configurable hamburger menu options!
The hamburger menu is now divided into the main section (visible to everyone) and the developer section (visible to developers only).
The developer section is context-aware. It appears if the app is running onlocalhostor if it was deployed in Streamlit Cloud (and if the current user is the app’s developer)
Here is what it looks like: The hamburger menu is now divided into the main section (visible to everyone) and the developer section (visible to developers only).
Here is what it looks like:
In light of the context-aware visual redesign, you’ll see the Clear cache button when viewing the app as a developer.
Happy Streamlit-ing! 
Snehan