Tried the new build (25082010), and same problem. Refuses to open, and claims reinstall might fix it (no installer available). Not trying to complain by any means, just trying to help you with troubleshooting the SSE1 builds. I guess I will have to wait until official 0.8 is available (hopefully not abandoning SSE1).
I got my old work box working again and installed on that as well. Same problem as laptop. Both 32 bit Windows XP Pro SP2 (laptop: Tablet Edition 2005) with SSE1 graphics cards. Full specs below.
AMD Athlon XP-M 2200+ 1.67 MHz, 32 bit Windows XP Pro SP2/Tablet Edition 2005, SIS M741 (onboard/shared: 32 MB) graphics card with OpenGL 1.2 - SSE1 - Direct X 9c, DDR400 1024 MB RAM
Workbox PC Specs:
AMD Athlon XP 1250 1240 MHz, 32 bit Windows XP Pro SP2, BFG nVIDIA GeForce 7300 GT 512MB 128-Bit GDDR2 AGP 4X/8X Video Card with OpenGL 2.0 - SSE1 - Direct X 9c, DDR400 3 G RAM
Maybe this will help you out, maybe not. Regardless, thank you for trying, and all your hard work.