V4.1 - Pro firmware update broken

Changes

• Fixed the auto-save PNGs bug (and the bug that I caused by fixing that)
• Fixed the firmware updating/installing the wrong version
• The software now uses per-compiled firmware files (for PRO at the moment) so any firmware updates will not need to be compiled locally which should fix a number of user's issues with firmware updates.
• The firmware files are now downloaded independently of the main software update so any firmware changes can be made without needing to update the whole app.
• The overdrive modes list is now downloaded at program launch, so when the list gets updated with more brands & modes, that doesn't need a whole app update to update.
• The new V1.5 firmware for the Pro boards is required for any boards shipped in the last two months with the revised circuit design. It should actually improve stability of the gain potentiometer on the original design too, but the new designs do not work with V1.5 or older.

Known issues

• The scaling issue is still a pain. Setting your monitor to 100% scaling in Windows should fix the issue (with an app restart too) but I'm trying to work out what I need to change to get it to just work.
• I'm going to be improving the DirectX code for the input latency test, it won't affect much but I've fixed a bug during development of my OSLTT project so I'll port that fix over for the next update.