It won't be long before Version 1.20 is available for Download. The previous version will remain available for now. Be advised you may not be able to have both installed at the same time.
The objective of RTM_TimerCalc is to make -easier- the creation of C++ Timer code for Arduino Nano, Uno and Mega2560. Unfortunately, newer versions have added features that may seem bewildering to Noobs getting their feet wet with Timers. In order to give you a choice, I'm leaving Version 1.01 up in case you need to go back to it. It will appear in the Previous Versions forum as a separate *sticky* post.
The needed updates to this next Version (1.20) required quite a few changes. Along the way, I added more goodies to help folks play "what if" games. This slowed things down as way more testing was required. It seems not a day goes by where I don't discover another bug and then make more changes (which leads to more testing).
The main download page is undergoing changes to prevent file leeching. I see numerous downloads take place with no visit to Runtime Micro. The file itself is well hidden but the download invocation is pretty easy to copy and paste. Why folks don't link to the download page itself, I don't know. In any case, the new system uses Webform buttons and is pretty insulated from file leech tactics.