It should work fine on 98/ME, with one other exception : The 'browse for folder' is currenly broken within the Options screen. I have fixed this in the next version, however. Yes, there WILL be a new version, just not sure when at this stage. I will try & get it out there by the end of the month!
BobA - For Find to work better, I will have to write my own on screen keyboard, which will take me some time. The way I want to do it will take some time to get right. I did fix up the Jump screen tho, with left/right buttons on that screen, as well as being able to click on the letter to select it.
Once I have done my own on-screen keyboard, there shouldn't be anything else that works in XP/2000 that doesn't work in 98/ME, as far as I'm aware.