(v1.1)
Implemented a separate EXE for calculating the MD5 values. This then allowed me to develop a progress bar for feedback. Several other minor improvements. NOTE - The incremental speed of the progress bar is based on the time taken and file size of the previous calculation, so can only be seen as approximate (a guide only), especially as the process can be impacted by some variables.

(v1.2)
Added a checkbox to allow calculating the checksum of just one file. Additionally, you can also paste a checksum value into the second result field (input), and the result will be compared with that. Bugfix for stored values which weren't updated, unless you restarted the program (bytes & taken values used in updated calculations).

(v1.3)
Improved how 'time taken' is recorded, to avoid negative percentage values being displayed when the previous calculation was less than a second. NOTE - This is basically a bugfix using the recording of a prior record, if the 'time taken' is less than two seconds. It also means the program can switch at need, between a marquee or percentage progress bar, though once a 'time taken' value over 1 second has been recorded, then the marquee progress bar should never appear again.
