Now GEOTEC Office 12.1 (Including ELPLA) is simpler with only one edition that works for all and it is free for non-commercial use. 

ELPLA is available in three editions, each geared to meet a specific set of user requirements. The features available to you depend on which product you have.

ELPLA Lite Edition (Free): ELPLA Lite edition allows users to easily create projects for analysis and design floor slab or raft foundation. It includes all the ELPLA standard functions except that the node number is limited to 300 nodes.

ELPLA Professional Edition: The professional edition provides professional users with all methods for analysis and design floor slab, isolated raft or system of rafts. It includes all the features of the ELPLA theory.

Full documentation is provided with All editions: Documentation provided with ELPLA includes the "ELPLA reinforced concrete design" book plus ELPLA User’s Guide containing full documentation of ELPLA theory with illustrated examples.

The following table shows the difference among ELPLA editions: