You can still get designPH 1.5 DEMO here...
Existing designPH owners
If you have already purchased designPH PRO, please beware if you download and install designPH DEMO, you cannot have 2 different versions of designPH installed within the same version of SketchUp.
SketchUp compatibility
If you do not already have SketchUp installed, first download and install SketchUp from the official website or a reseller.
Either the free Make or paid Pro desktop versions of SketchUp can be used. designPH DEMO is compatible with SketchUp 8 -SketchUp 2019 on PC and Mac.
SketchUp 2017 Make is the last free desktop version of SketchUp.
designPH 1.5 DEMO is an older version and is not compatible with SketchUp 2021 and above.
The web-based "SketchUp Free" does not support third-party extensions so cannot be used.
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