Nero 7 Burning ROM Cache is not cleared

CCleaner does not clean Nero 7 Burning Rom's cache.

I choosed a custom directory and lately noticed that inside the cache directory there were 800MB of stuff that needed to be cleared. Though Nero should clear the cache itself, yet sometimes it does not do so, and still though Ahead Nero Burning Rom is detected by CCleaner under Applications, it does not clear the cache directory.

Using CCleaner v. 1.26.218