Summary of changes from previous releases are here:

Key Improvements for R1.5:-

OSD - support for newer baseflight release - separate pitch/roll config OSD - support for newer cleanflight release - separate pitch/roll/tpa breakpoint config OSD - OSD chip automatic fail / recover. Avoids blank screens from supply noise. OSD - OSD TX switch channel can be changed in OSD menu OSD - faster PWM RSSI implementation for standard 50hz PWM OSD - user adjustable AHI maximum limits OSD - more accurate mah used / faster display updates. 10 times vs 1 time per second OSD - choice of MSP speed options for faster display updates OSD - support for 9600 baud OSD - general display refresh speed improvements from RSSI / VSNC / MSP OSD - improved reset function OSD - improved eeprom default function (adds equivalent to eeprom_clear) OSD - pitch and roll angle display FONT - improved new large font from Schnupperm FONT - improved new large font from Anton Krug BUGFIX - Cleanflight amperage correction BUGFIX - MultiWii 2.4 amperage correction BUGFIX - GUI not loading custom font after saving. BUGFIX - GUI font patch incorrect. BUGFIX - Font upload issues when using vsync BUGFIX - When arming in menu, exits without save and enables serial operations BUGFIX - UBLOX/MTK support for GPSOSD users GUI - more realistic serial simulation method GUI - font upload progress display GPSOSD - configurable parameters for GPSOSD arming and flight summary setting GPSOSD - RSSI input can bu used instead for screen switch functionality MISC - option to clear EEPROM MISC - option to upload font without using GUI