Although a single docrypt install can encrypt / decrypt any data you have access to,

you may freely install docrypt.jar (or .exe) on 1 or more computers, flash drives, in the cloud, etc.

Each install (on a flash drive, on a separate computer, etc.) makes its own program files.

For example, below shows 2 separate copies of docrypt installed to 2 different folders.

Each has its own
keystore and
other program properties

Each works as a separate program
& does not share data
with other docrypt.exe installs.

If desired, Docrypt tools enable you to share data (e.g. encryption keys) across docrypt installs.