https://bugs.winehq.org/show_bug.cgi?id=46385
--- Comment #6 from Van winebugrpt18356@fastmail.jp --- I believe there's an issue with using WINE prefixes under WINE 4x that limits copying and pasting only within TreePad. To recreate:
01) Start with a clean WINE prefix or bottle; i.e. a clean .wine folder under your home folder.
02) From terminal or the command line, enter the following command:
cp .wine .wine-treepad
03) Install TreePad XSU Enterprise 12GB (single user) v7.17.0 into .wine-treepad using the steps outlined in bug #46352.
04) Issue the following command from terminal or the command line to start TreePad:
WINEPREFIX="/home/[user]/.wine-treepad" wine start 'C:\Program Files (x86)\TreePadXSU\TreePadXEnterprise.exe'
05) Open an existing TreePad database, or create a new one, and attempt to copy and paste text in a TreePad database article (right window) to or from another application in Linux; e.g. text editor, word processor, browser, etc.
The copy and paste should fail when attempting to do so outside of TreePad.