So you are telling me you don't have a shapes folder???
Then how do you load in the items and brick textures then?
*Oh wow just realize i bump a old topic, go me -_-
All the content files (like images) in the blockland folder are copied into cache.db when you start blockland, so it can still use them even if you delete some. Note that this doesn't work in all cases.
You can right click blockland in your steam library, go to properties, go to local files, and click "verify game cache" to fix the missing files