Substance Designer 2019.3.1 has been released and features tons of fixes!

Fixed:

• [Graph] Severe performance drop and freezes when tweaking a nested graph with "In-Context Editing" active
• [Graph] Cannot enter enum value out of [0, 99] in Integer1 tweak
• [Graph] Comment is not moved when the corresponding frame is displaced
• [Graph] Input names are missing on custom instance node
• [Graph] Thumbnails may be rendered when loading graph even if the corresponding option is disabled in the Preferences
• [2D View] Negative alpha shows checker no matter the display option
• [2D View] Surface conversion from 32f to 8bits fails with high values
• [2D View] Top/left skew and 'Make Square' set some coordinates to huge values in forward transformation matrices
• [2D View] UVs of all mesh objects are not displayed on UV sets other than "0"
• [Content] Bevel: Angular mode does not work correctly on tiling mask
• [Content] Flood Fill To Gradient: slope image value is not sampled in the middle of the shape
• [Content] Function; "Equality Boolean" is broken
• [Bakers] Artefacts when using automatic tonemapping in "Curvature From Mesh" baker in specific cases
• [Bakers] Crash in DXR when baking while no material is selected
• [Bakers] Performances issue in the 2D View when enabling the "info"
• [Engine] 'Pow' function outputs huge values when using very low input value and high exponent on SSE2 engine
• [Engine] Crash when using a high jpg compression on bitmap resources
• [Engine] Value Processor returns wrong $size value when inside a subgraph
• [Parameters] Empty pop-up appears when selecting an instance node with high number of parameters
• [Parameters] Integer value is not shown in drop-down parameter items
• [Parameters] Transform Matrix 'Edit' button is not available in Preview mode
• [Cooker] $size in ValueProcessor is wrong when inside a graph instance
• [Cooker] Outputsize is incorrect when value link passes through a dot node to an atomic node
• [UI] Button to display all items in the 2D View bottom bar is not visible
• [UI] Preview of picked RGB values display incorrect numbers when using Color Management
• [Export] 16f RGBA images are exported as grayscale
• [3D View] Cannot import OBJ with multiple spaces
• OCIO config is not taken into account when publishing sbsar
• Color sliders ranges can expand exponentially in a specific case
• [Doc] "paramValue" section is incomplete in Sbs format reference
• [MDL] Color Widget in sbsar instances are not correct
• [Presets] Crash when updating presets in a specific case
• [PSD] FreeImage error when loading PSD files from recent versions of Photoshop
• [Resources] Crash when undoing Bitmap linking directly into graph
• [SVG] SVG nodes do not update automatically when using the vector tools