The earlier licensing system of the Calculator Plugins has been = recently modified. You can find information on the new licensing system bel= ow.

The new licensing system consists of 6 different licens= es. The new licenses and the calculations that they cover are the following= :

- Structural Calculations: Charge, Conformation, Geometry= , H=C3=BCckel, Refractivity, Hydrogen Bond Donor/Acceptor (HBDA), Structura= l Frameworks calculations
- Protonation: pK
_{a}, Major Microspecies, Isoelectric Point calc= ulations - Partitioning: log
*P,*log*D,*HLB calculations - Isomers: Tautomerization, Stereoisomers, Resonance calculations
- Solubility: Solubility Predictor
- NMR: NMR Predictor

Being a user of the Calculator Plugins

Plugin pricing is based on the *number of users*. Notice that unl=
ike other products, *users* are those who perform predictions OR&nbs=
p;those who make informed decisions based on the calculated/predicted prope=
rties.

Calculation Pack and All Plugin license

The Calculations Pack and All Plugin licenses are not available for purc= hase anymore.

Users who have the Calculations Pack licenses and would like to renew th= em can choose any 3 of the new licenses above.

Users who have the All Plugin licenses and would like to renew them get = all new licenses.

Free calculations

Elemental Analysis c= alculations (e.g. molecular mass) are free and therefore their usage do= es not require a license in any ChemAxon product where the calculation is a= vailable.

The 2D Topologica= l Surface Area calculation within the Geometry Group is also free. Howe= ver, other calculations of the Geometry group are not free.

About the Structural Calculations license

The Structural Calculations license covers a wide selection of structura= l calculations grouped together from our earlier set of calculations. Indiv= idual calculations can't be purchased separately.

About the Structural Calculations license

The Charge Group contains the Charge Distribution, Polarizability and Or= bital Electronegativity calculations.

The Conformer Group contains the Conformers, Molecular Dynamics and Flex= ible 3D Alignment calculations.

The Geometry Group contains the Topology Analysis, Geometry, 2D Topologi= cal Surface Area, 3D Molecular Surface Area calculations.