Official version history and changelog information for Surfer (2020). 

Surfer 18.1.186 (June 8, 2020)

Fixes:

• Automation: Can't call MapFrame overlays if a map layer is selected in the UI
• 3D View: surface shading is all black
• TIF import: use datum ellipsoid as projection ellipsoid, if no projection ellipsoid is found
• Surfer Error occurs when loading base layers in particular order
• Base map: can no longer group groups within a base layer
• Vector PDF: transparency and image contrast aren't exported correctly
• Base(vector): Info: Cannot enter attributes values for new objects
• Paste: doesn't go in center of page anymore
• Pasting contour map and Undoing doesn't undo the paste (it just removes the color from the contours)
• Entire map is pasted into Base layer
• GeoTIFF: importing at grid corners instead of grid cell centers
• KML Import: reading apostrophe ' as '
• Internal Error after pasting a map in base layer (transformer.cpp)
• Internal Error when gridding data (searchtableau.cpp)
• Internal Error after undoing map create (scenelist.cpp)
• Internal Error after updating properties (pmplotdocinterface.cpp)
• Internal Error with undo deleting (scenelist.cpp)
• Internal Error when creating 3D View when using Parallels for Mac (vlrenderer.cpp)
• Crash when drag object in Contents window from plot document into base layer
• Crash when gridding was cancelled
• Crash when create 3D View 
• Crash when opening a corrupt v12 SRF file instead of issuing error

Surfer 18.0.160 (April 5, 2020)

New features and improvements:

• 3D View: export to image file (TIF, JPG, PNG, BMP, etc)
• 3D View: Vertical Exaggeration: add 'Reset' button
• Attribute Table: is much faster when there are thousands of attributes
• Attribute Table: do not alphabetize added attributes
• Attribute Table: edit the ID field contents to rename an object
• Base Layer: set the coordinate system for a base layer when in edit mode
• Base Layer or Group: Start/Stop Editing not required to edit or add objects
• Base Layer or Group: indicate which layer is in editing mode in Contents window
• Base Layer or Group: Zoom selected to zoom to selected object in base layer or group
• Base Symbology: Unique Values: save/load table of values and properties
• Contents: select multiple map layers and delete
• Contents: select multiple map layers and reorder within map
• Contents: select multiple objects and toggle visiblity
• Digitize: keep red crosses on plot when clicking inside Digitized Coordinates window
• Export: select and export individual map layers, not the entire map
• Export: select and export individual objects in base layer, not entire map/layer
• Image: Crop
• Image: Set Transparent Color
• Map Measure: allow when in edit mode for a base layer or a group
• Map New or Map Add: select multiple files (data, base, grid) at once
• Profile: create profile from any polyline in any Base layer
• Ribbon: Features: move Split and Combine into New Features group
• Scale Bar: convert Linear units for labels (e.g. meters to km, feet to miles, etc)
• Scale Bar: link Cycle Spacing to Label Increment by default
• Scale Bar: Title and Labels use different Font properties
• Shapes (rectangles, rounded rectangles and ellipses): create as polygons
• Shapes: allow to use with Move/Copy to Layer and Duplicate
• Shapes: convert to polyline
• Shapes: draw in a base layer when there's a geotransform
• Shapes: label with attributes when in a base layer
• Shapes: Split and Combine them
• Shapes: use with Grid Volume, Grid Data, and Assign NoData
• SHP Export: export Base with numeric attributes as numeric (not text)
• Welcome dialog: Add Grid Data button

Fixes:

• 3D View: Vertical exaggeration reverted to default after 2D map change but visualization does not
• Attribute Table: empty fields should not be removed from Properties
• Attribute Table: error when try to rename field to existing name (invalid argument) and contents are deleted
• Attribute Table: Some headers appear different than others
• Base from Server: Servers unresponsive
• Base Symbology: settings are not showing up because of roundoff in attribute values
• Base Symbology: text attributes read as numeric
• Cannot connect to a specific WMS server when previous versions of Surfer could
• Cannot create more than one 3D view per SRF file
• Can't save SRF containing Point Cloud with removed criteria-selected points
• Copying/Pasting map selects all item in a map
• Crash after editing text and selecting a point
• Crash closing Surfer immediately after it starts
• Crash when access Help
• Crash when accessing the Colormap Editor
• Crash when clicking on a worksheet window
• Crash when export
• Crash when opening 3D View
• Drop Shadow: Secondary shadow is created upon export
• Error on startup: "Numbers may not have leading zeros at line xx"
• Geode:Server error: Parameter ‘layers’ contains unacceptable layer names
• Grid Data: Faults aren't created in map created from Grid Data wizard (but reload makes it appear)
• Grid Data: Variogram: Filter Data does not apply to modelling page
• Gridding: Data filtering not working properly
• Hide labels for base objects that are invisible
• Internal Error (tristripper.cpp)
• Internal Error after undoing a post map creation (stack.cpp)
• Internal Error during Grid Data in Cross Validation with Triangulation or Natural Neighbor (delaunaytriangulation.cpp)
• Internal Error when doing action between double clicking text (mtxelements.h)
• Internal Error when editing post map (stack.cpp)
• Internal Error when enter Math Text Editor (mtxelements.h)
• Internal Error when exporting to a vector format (e.g. PDFv, GSB, BLN, etc) (trgraphics.cpp)
• Internal Error when gridding data using kriging (kriginggridder.cpp)
• Internal Error when saving a file (attribute.cpp)
• Map Wizard: Advanced gridding: error xMin must be <xMax but data grids fine with Simple or in Grid Data
• PDF Export: vertical transform not honored for color relief layers
• Profiles: Adding georeferenced layer to unreferenced map with profile creates looping errors
• Query not selecting correct objects using Text attributes
• Reload data while editing base layer loses track of editing list