That seems to be weird behavior.

Did it actually install and it fails to keep running in demo mode? or are you're can't complete the install?

Did you try using EXPBLOCKS command ?
That's a specific tool palette for blocks.

CMS IntelliCAD has similar to OtherCAD way of auto-loading .irx applications using registry:
viewtopic.php?p=6526

Please note that custom applications needs to be ported and rebuilt using CMS IntelliCAD to make them work inside CMS IntelliCAD.

Actually I'm also using Microsoft Windows 10 and the Windows taskbar is set to be automatically hidden. As far as I can check, CMS intelliCAD and Windows taskbar work both modes.
Can you provide more details? Did you check for Windows 10 updates?

As far as I can track, CMS IntelliCAD default dimension style do not follow any specific standards. At a blank drawing, I believe you can set the default dimension style with specific ANSI dimensions settings and then overwrite the icad.dwt default template (ore create a new one). Each time you crea...

Does the user interface looks like this one? If so, just double click on top of the grey "command" bar