Please try to proceed with the full reinstallation:
Check that you have installed all latest updates for Windows.
If you need to save your settings, copy Config and Notes folders in a safe place before uninstalling Hand2Note:
After the uninstallation has finished please delete all files from the install directory (default folder is located in C:\Program Files\Hand2Note).
Install the latest version of Hand2Note:
Register your license key in Configuration->Other Options->License
Then, run Hand2Note in the default configuration and check whether the issue persists.