All 30 day users get the full version of DPS, with free e-mail support for the duration of the license. After the monthly payments have totalled an agreed purchase price, you pay no more and become a full user of DPS.
You may then purchase continued support at £120/year and continue to recieve free upgrades to the software for its lifetime. Contact sales if you need more information.
The minimum monthly license term, at start, is three months.
Once the monthly payments are complete, Updates and support must be ordered separately.