Brilliant! Indeed BuddyPress was not fully deleted from my files, when I checked via C-Panel File Manager. AND – yes, I’d hit a limit on my resources with my hosting provider. So I increased my resources allotment, and I removed all BuddyPress files and started over. All seems OK now! Thanks so much.
Yikes! I decided to clear my cache on the website: installed and used “clear my cache” plugin. Then tried reinstalling buddypress, and now I have a new error message:
Installation failed: Could not copy file. buddypress/bp-xprofile/classes/class-bp-xprofile-field-type-textbox.php