Try moving cache.db somewhere else
If you don't know where that is use this guide:
STEAM LOCATION >>[1] In your steam library right click blockland
[2] Click on properties
[3] Click on the local files tab
[4] Click on browse local files.
[5] Move your Cache.db file or Cache file if you don't have extensions on.
NON-STEAM LOCATION >> (Windows)
[1] Go to my documents
[2] Click on blockland
[3] Move your Cache.db file or Cache file if you don't have extensions on.
If anyone wants to do the mac way for non-steam feel free, I don't know where the blockland files are downloaded for macs.