I've pushed an update, v1.8.3, which now only enables profile support with JSON v6.6.0+. Run "texturecache.py update" to pull the new version, then you should be OK to run vscan on the old system.
Texture Cache Maintenance Utility: Preload your texture cache for optimal UI performance. Remotely manage media libraries. Purge unused artwork to free up space. Find missing media. Configurable QA check to highlight metadata issues. Aid in diagnosis of library and cache related problems.