Business use?

I do IT for a firm that does contracted support for multiple clients. We have several that use "for home users" software (not installed by us) that is free for home users but businesses should technically pay for.

I love CCleaner and know that it has suggested donations, and lists itself as available for home use and business, but I am wondering if businesses can legitimately use the software without paying?

I see "support" as the paid option, but was unsure if non-home users can use the program for free...and is there anything besides support, i.e. different features, available in the paid option.

Ccleaner is free for all to use, business or home user.

The paid support is available for people (or businesses) who would want professional help on queries or problems from the paid support advisors.

The is no difference in the ccleaner product if you use the paid support or not.