1. I will most likely purchase the software that I've used for years (with only a $10 donation years ago) once a stable version of 2x is released. Any projections?
2. When purchasing it now says a license. Does this mean that you may the same amount every year to keep the software running?
3. If I wish to clean the drive of installation files (both Windows and Windows applications) does either the free or paid version handle this task?
The current version of CCleaner is 3.27.1900.
Be sure you only download CCleaner from one of the sites linked here to avoid getting some fake version.
http://www.piriform....leaner/download
The Pro version comes with technical support from the piriform staff. I think it is for one year, and after that, if you still want technical support you have to renew the license.
If you choose the free version, you can get help for it from the volunteers on this forum.
For question 3, what does that mean:
"3. If I wish to clean the drive of installation files (both Windows and Windows applications) does either the free or paid version handle this task?"
You can read about what CCleaner does here: http://www.piriform.com/docs/ccleaner. Lot of reading, but you are wise to learn what CCleaner will do before using it.
stable version of 2.x what do you mean. There are no betas of ccleaner or other piriform products all versions released to the public are stable versions