The demo version disallows the printing or exporting of created logos but otherwise seems to be fully functional.
Old test results
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Selected Test Results (selected in 'Test Results' table below)
Essentially, everything. Caveats below.
What does not
So far, the *only* thing I have found to be less-than-perfect, at least under KDE, is that the initial window size extended slightly beyond the right-hand border of the screen and below KDE's taskbar. It was easily adjusted to a more appropriate size.
What was not tested
In the demo version, it is impossible to print or export logo creations so I was unable to test these features.
One could do the job with the GIMP and have greater flexibility but, imho, less ease. Since the demo's a free and easy download/install, it's easy enough to see if it would be useful to you. Cost for full license: $59.00