Add "[HKEY_CLASSES_ROOT\tptransfer\shell\open\command]="C:\Program Files (x86)\TPTransfer\TPTransfer.exe" and then launch TPTransfer from TPControl using "tpcurl-tptransfer://"

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As an example, the following registry change on the Surface Pro panel allows us to launch the Sonos App with 'TPCURL-sonos://' from TPControl

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\sonos]
@="URL:sonos Protocol"
"URL Protocol"=""

[HKEY_CLASSES_ROOT\sonos\shell]
@="open"

[HKEY_CLASSES_ROOT\sonos\shell\open]

[HKEY_CLASSES_ROOT\sonos\shell\open\command]
@="C:\\Program Files\\Sonos\\Sonos.exe"

(Source: Chuck Carpenter, Watermark LLC)