In Editor Settings I have "Asset Serialization" set to 'Force Text'.
After deleting ObiRope 3.1 and importing 3.2, I get the error message: "Binary to YAML conversion: type unsigned int is unsupported"
Workaround was before upgrading, switch Asset Serialization to 'Mixed Mode'.
Then return to 'Force Text' after import.
*EDIT* Forgot to mention I am using Unity 5.6.3.
After deleting ObiRope 3.1 and importing 3.2, I get the error message: "Binary to YAML conversion: type unsigned int is unsupported"
Workaround was before upgrading, switch Asset Serialization to 'Mixed Mode'.
Then return to 'Force Text' after import.
*EDIT* Forgot to mention I am using Unity 5.6.3.